Atop a plateau overlooking the Brush Creek Valley, Serpent Mound is the largest and finest serpent effigy in the United States. Nearly a quarter of a mile long, Serpent Mound apparently represents an uncoiling serpent. In the late 19th century, Harvard University archaeologist Frederic Ward Putnam excavated Serpent Mound and attributed the creation of the effigy to the builders of the two nearby burial mounds, which he also excavated. This, this culture is referred to as the Adena (800 BC–AD 100). A third burial mound at the park and a village site near the effigy's tail belong to the Fort Ancient culture (AD 1000–1550). A more recent excavation of Serpent Mound revealed wood charcoal that could be radiocarbon dated. Test results show that the charcoal dates to the Fort Ancient culture. This new evidence of the serpent's creators links the effigy to the elliptical mound and the village rather than the conical burial mounds. The head of the serpent is aligned to the summer solstice sunset and the coils also may point to the winter solstice sunrise and the equinox sunrise. Today, visitors may walk along a footpath surrounding the serpent. The museum contains exhibits on the effigy mound and the geology of the surrounding area.

The site offers exhibits and tours.

Named in honor of Henry Laurens, then president of the Continental Congress, Fort Laurens was built in 1778 in an ill-fated campaign to attack the British at Detroit. Supplying this wilderness outpost was its downfall, as its starving garrison survived on boiled moccasins and withstood a month-long siege by British-led Indians. The fort was abandoned in 1779. Today, only the outline of the fort remains, but a small museum commemorates the frontier soldier, presents a video giving the fort's history, and displays archaeological artifacts from the fort's excavation. The large park surrounding the museum is the location for periodic military reenactments. The remains of the soldiers who died defending the fort are buried in a crypt in the museum wall and at the Tomb of the Unknown Patriot of the American Revolution.

A second website covering the site, the Friends of Fort Laurens website, can be found here.

The site offers a short film; exhibits; and occasional recreational and educational events, including living history events.

Fort Jefferson Park and Monument mark the site of an advance outpost of General Arthur St. Clair, built in October 1791. It was named in honor of Thomas Jefferson, then Secretary of State. One of a chain of defensive forts built to protect army supplies from Indians, it served as a supply base throughout the campaigns of General St. Clair and General Anthony Wayne. It was abandoned in 1796. The monument is made of faced granite field boulders, six feet square and 20 feet tall. No part of the fort remains.

The site is open to the public.

Arkansas's tallest remaining prehistoric Native American Indian burial mounds are preserved at this National Historic Landmark site. These earthworks are the remains of a large ceremonial complex that was inhabited here from A.D. 600 to 1050. Visitors can tour the visitor center and see exhibits and audiovisual programs, and then take a walking tour of the mound site.

The site offers a short film, exhibits, tours, workshops, and occasional recreational and educational events.

The James K. Hampson Collection presents an amazing look at the decorative arts of the late Mississippian people from the Nodena Site. Notable pieces include a large collection of the famed "Nodena Red and White" pottery, Nodena type site points, and a variety of effigy vessels, including a remarkable human head effigy.

The site offers exhibits and occasional recreational and educational events.

The Park preserves and interprets the Parkin site on the St. Francis River where a 17-acre Mississippi Period American Indian village was located from A.D. 1000 to 1550. A large platform mound on the river bank remains. There were once many archaeological sites similar to Parkin throughout this region, but they did not survive as eastern Arkansas was settled. Visitors can watch research in progress, and see firsthand the results of careful excavations and laboratory analysis. Along with including an archaeological research laboratory, the park visitor center includes an interpretive exhibit area and auditorium. The park interpretive staff offers audiovisual programs, site tours, workshops, and other educational programs and special events and activities. When archaeological excavations are underway, visitors on guided tours can observe them. Visitors experiencing Parkin Archeological State Park can also tour the circa 1910 Northern Ohio Schoolhouse. By the beginning of World War II, there were 15 one-room and two-room schoolhouses providing education for children in Parkin, a town of less than 2,000 citizens. Today, the Northern Ohio School is the only one of these early Parkin structures still standing. The stories it tells of what took place here in the early 20th century in and around the Sawdust Hill community are parts of the historic fabric of Parkin, just as is the park’s interpretation of the prehistoric village of Casqui.

The site offers exhibits, tours, workshops, and educational and recreational programs and events.

Mastodon State Historic Site contains an important archaeological and paleontological site—the Kimmswick Bone Bed. Bones of mastodons and other now-extinct animals were first found here in the early 1800s. The area gained fame as one of the most extensive Pleistocene Ice Age deposits in the country and attracted scientific interest worldwide. Today, the 425-acre property preserves this National Register of Historic Places site and provides recreational opportunities. A museum tells the natural and cultural story of the oldest American Indian site one can visit in the state's park system. A full-size replica of a mastodon skeleton highlights the exhibits. A picnic area, several trails, and a special-use camping area offer chances to explore the land where the lives of Native Americans and mastodons once intertwined.

The site offers exhibits, a slideshow, tours, and educational programs.

Fort Bowie commemorates the bitter conflict between Chiricahua Apaches and the U.S. military—a lasting monument to the bravery and endurance of U.S. soldiers in paving the way for settlement and the taming of the western frontier. It provides insight into a "clash of cultures," a young nation in pursuit of "manifest destiny," and the hunter-gatherer society fighting to preserve its existence.

The site offers exhibits and tours.