Archaeology, the study of ancient human history through artifacts, structures, and landscapes, opens a window into the distant past. It reveals how societies lived, worshiped, built, and thrived, often dating back thousands of years to prehistoric and ancient civilizations. In the United States, archaeology gives you a glimpse into Native American history and early colonial life.   Sites like ancient earthen mounds and cliff dwellings date back millennia. They show the ingenuity and complexity of the cultures that shaped this land. These places, scattered across the country, are both historically significant and captivating destinations. For history buffs, adventurers, and culture enthusiasts, these ten must-see archaeological sites in the US offer a chance to explore the fascinating stories of the ancient past of America.   1. Cahokia Mounds, Illinois Cahokia Mounds World Heritage Site, Illinois. Source: Wikimedia Commons   Cahokia Mounds, located near Collinsville, Illinois, is the most extensive pre-Columbian archaeological site north of Mexico. Established around 700 CE, Cahokia flourished between 950 and 1350 CE, serving as the central hub of the Middle Mississippian culture. At its zenith, the city spanned approximately 4,000 acres, encompassing about 120 earthen mounds and housing a population nearing 20,000, surpassing London’s population at that time.   The site’s most prominent feature is Monks Mound, a massive earthen structure rising over 100 feet, covering nearly 15 acres at its base. This mound is the largest pre-Columbian earthwork in the Americas and served as the political and religious epicenter of Cahokia.   Designated a UNESCO World Heritage Site in 1982, Cahokia Mounds offers you a glimpse into the ingenuity of its ancient builders. The site features an Interpretive Center with exhibits detailing the daily life, culture, and eventual decline of this prehistoric metropolis. You can explore over 5.4 miles of trails, ascend Monks Mound for panoramic views, and observe reconstructed structures like the Woodhenge, a timber circle believed to have been used for astronomical observations.   2. Mesa Verde National Park, Colorado Cliff Palace in Mesa Verde National Park, Colorado. Source: Wikimedia Commons   In southwestern Colorado lies Mesa Verde National Park, a breathtaking testament to the ingenuity and resilience of the Ancestral Pueblo people. This UNESCO World Heritage Site preserves nearly 5,000 archaeological treasures, including over 600 meticulously constructed cliff dwellings. These ancient structures, such as the renowned Cliff Palace, are carved into the rock faces of towering mesas and serve as a remarkable window into a civilization that thrived from 550 to 1300 CE.   When at Mesa Verde, make sure to explore the architectural brilliance of these dwellings on guided tours, climbing ladders, and navigating tunnels to reach sites like Balcony House and Long House. Beyond its historical significance, the park’s 52,000-acre expanse offers scenic trails, such as the Petroglyph Point Trail, where hikers can marvel at ancient rock carvings while taking in sweeping canyon views.   A trip to Mesa Verde isn’t complete without visiting the Chapin Mesa Archeological Museum, which houses artifacts like pottery, tools, and textiles alongside vivid displays that bring the past to life.   3. Chaco Culture National Historical Park, New Mexico Chaco Culture National Historical Park. Source: Raychel Sanner on Unsplash   This UNESCO World Heritage Site, lying in the vast expanse of New Mexico’s desert, was once a vibrant cultural and ceremonial center. It showcases the civilization of the Ancestral Puebloan people that thrived over a thousand years ago, leaving behind monumental achievements in architecture, astronomy, and engineering.   Unlike other ancient settlements, Chaco’s legacy is defined by its remarkable great houses, such as the renowned Pueblo Bonito. These massive stone structures, some reaching four stories high, were meticulously designed with hundreds of rooms and ceremonial kivas. What sets Chaco apart is the precise alignment of these buildings with solar and lunar cycles, reflecting an unparalleled understanding of the cosmos.   The Chacoans also constructed an extensive network of roads, stretching across the desert for hundreds of miles, connecting distant communities with the heart of Chaco. These straight paths, built with purpose and precision, reveal the strategic importance of the region as a hub of trade, culture, and knowledge.   Make sure to wander through the sprawling ruins of Chetro Ketl, peer into the massive kiva at Casa Rinconada, or trek to Fajada Butte, home to the mysterious Sun Dagger, a celestial marker that once tracked the passage of time with remarkable accuracy. At night, the park transforms into one of the most awe-inspiring stargazing locations in the world, its pristine skies offering a view of the cosmos that connects past and present.   4. Serpent Mound, Ohio Great Serpent Mound, via Wikimedia Commons   Serpent Mound in Adams County is the world’s largest surviving effigy mound, a prehistoric earthwork in the shape of a serpent. Stretching approximately 1,348 feet in length, this ancient structure winds gracefully atop a plateau overlooking Ohio Brush Creek. Its origins remain a subject of scholarly debate, with estimates placing its construction between 1000 BCE and 1070 CE.   The mound’s precise purpose is unknown, but its design suggests significant ceremonial or cosmological importance.   When you visit Serpent Mound, you’ll learn a lot about ancient Native American cultures. The site features a museum with exhibits detailing the mound’s history and the archaeological findings from the area. A walking path allows you to view the effigy from various angles, and an observation tower provides an elevated perspective of the serpent’s full form.   5. Poverty Point, Louisiana Mound A at Poverty Point, Louisiana. Source: Wikimedia Commons   This prehistoric earthwork complex constructed by indigenous peoples between 1700 and 1100 BCE is found in northeastern Louisiana. It’s a UNESCO World Heritage Site encompassing a series of concentric earthen ridges and mounds, including the massive Mound A, which stands 72 feet tall. The site’s design and scale suggest it served as a significant ceremonial and trade center, with artifacts indicating extensive trade networks reaching as far as the Great Lakes and the Appalachian foothills.   When you head to Poverty Point, you will witness the ancient ridges and mounds via walking trails or guided tram tours. The on-site museum offers exhibits featuring artifacts such as pottery, tools, and jewelry, providing insights into the daily lives and sophisticated culture of its builders. Interpretive programs and special events further enrich the experience.   6. The Effigy Mounds, Iowa Effigy Mounds National Monument, Iowa. Source: Wikimedia Commons   Effigy Mounds National Monument, located in northeastern Iowa along the Mississippi River, preserves over 200 prehistoric mounds built by Native American cultures between 500 BCE and 1300 CE. Among these, 31 are effigy mounds shaped like animals, including bears and birds, reflecting the builders’ spiritual beliefs and connection to nature.   These mounds hold deep cultural significance for many Native American tribes, serving as sacred spaces and burial sites. The monument’s landscape offers insight into the ceremonial and social practices of the Woodland period, highlighting the sophisticated mound-building traditions of the time.   You’ll have the chance to explore 14 miles of hiking trails that wind through diverse ecosystems, including forests, prairies, and wetlands. The trails provide access to various mounds, such as the prominent Great Bear Mound, measuring 42 meters from head to tail. The visitor center features exhibits on the archaeological and natural history of the area, offering a comprehensive understanding of the site’s importance.   7. Fort Ancient, Ohio Fort Ancient calendar marking mound. Source: Wikimedia Commons   Perched atop a wooded bluff overlooking the Little Miami River in Warren County, Ohio, Fort Ancient Earthworks & Nature Preserve stands as a monumental testament to the engineering prowess and ceremonial practices of the Hopewell culture. Constructed between 100 BCE and 400 CE, this expansive site encompasses approximately 100 acres, featuring an extensive network of earthen walls stretching over 18,000 feet, interspersed with 84 openings, and accompanied by mounds and ditches.   The precise purpose of Fort Ancient remains a subject of scholarly debate. While its elevated position and extensive earthworks might suggest a defensive role, the internal placement of ditches and numerous gateways indicate it likely served as a ceremonial and social gathering place.   Learn about the rich history of the site through the 9,000-square-foot museum that showcases artifacts spanning 15,000 years of Native American heritage in the Ohio Valley. The museum features exhibits on the Adena, Hopewell, and Fort Ancient cultures.   The surrounding nature preserve boasts miles of hiking trails that meander through diverse landscapes, including woodlands, prairies, and river vistas. Notable paths include the Mound Trail, which guides you past secluded mounds, and a trail leading to the southern lookout, believed to be the ancient entry point for visitors arriving by boat on the Little Miami River.   In recognition of its cultural and historical significance, Fort Ancient, along with other Hopewell Ceremonial Earthworks, was designated a UNESCO World Heritage Site in 2023.   8. Montezuma Castle, Arizona Montezuma Castle National Monument, located near Camp Verde, Arizona. Source: Wikimedia Commons   Located near Camp Verde in central Arizona, Montezuma Castle National Monument preserves a remarkable example of pre-Columbian cliff dwellings. Constructed by the Sinagua people around 1100 CE, this five-story, 20-room structure is nestled into a limestone cliff approximately 80 feet above the valley floor. Despite its name, the dwelling has no connection to the Aztec emperor Montezuma; early settlers mistakenly attributed its construction to the Aztecs, leading to the misnomer.   The Sinagua, whose name means “without water” in Spanish, were adept at thriving in the arid environment of the Verde Valley. They constructed the cliff dwelling using local materials, including limestone and mud, creating a structure that has withstood the test of time. The elevated position of the dwelling provided protection from floods and potential invaders while also offering a vantage point over the surrounding area.   In 1906, President Theodore Roosevelt designated Montezuma Castle as one of the nation’s first National Monuments under the Antiquities Act.   When you head to the Montezuma Castle National Monument, you’ll be able to view the impressive cliff dwelling from a paved loop trail at its base. The on-site museum offers exhibits on the Sinagua culture, showcasing artifacts such as pottery, tools, and textiles that provide insights into their daily lives and craftsmanship. Additionally, the monument includes Montezuma Well, a natural limestone sinkhole that was also utilized by the Sinagua for irrigation and as a water source.   9. Jamestown, Virginia Worship at Jamestowne, Virginia. Source: Flickr   Jamestown, established in 1607 on the banks of Virginia’s James River, holds the distinction of being the first permanent English settlement in North America. This historic site offers profound insights into the early colonial era, marked by the settlers’ interactions with Indigenous populations, the introduction of African labor, and the nascent stages of American democracy.   The Jamestown Rediscovery Project, initiated in 1994, has been pivotal in unearthing the original James Fort, long believed to have been lost to river erosion. Archaeologists have since uncovered a wealth of artifacts, including personal items, tools, and remnants of early structures, shedding light on the daily lives and challenges faced by the colonists.   When you’re in Historic Jamestowne, you’ll witness archaeology in action, exploring the remains of James Fort and engaging with ongoing excavations. The Archaearium museum showcases over 4,000 artifacts, providing a tangible connection to the 17th-century settlers. Guided tours and interactive programs further enrich the experience, offering diverse perspectives on the site’s multifaceted history.   10. Moundville Archaeological Park, Alabama Human effigy bowl excavated at the Moundville Archaeological Park in Moundville, Hale County, Alabama. Source: Wikimedia Commons   Moundville Archaeological Park, located near Tuscaloosa, Alabama, preserves one of the most significant Native American heritage sites in the United States. Between 1000 and 1450 CE, Moundville was a thriving political and ceremonial center for the Mississippian culture, second in size and complexity only to Cahokia in Illinois.   The 326-acre park features 29 massive flat-topped earthen mounds arranged around a central plaza. These mounds served as platforms for civic and ceremonial structures and the residences of the society’s elite. The site’s layout reflects a highly organized society with sophisticated social, political, and religious systems.   When there, you can explore the well-preserved mounds and learn about the Mississippian culture through various exhibits and programs. The Jones Archaeological Museum showcases artifacts such as pottery, tools, and ornaments, providing insights into the daily lives and artistry of the Moundville inhabitants. The park also offers nature trails, a campground, and hosts events like the annual Moundville Native American Festival, celebrating the rich heritage of Southeastern Native American cultures.