Regions of Arkansas are home to famous cultural and natural landmarks, such as the Arkansas Air and Military Museum or the Blanchard Springs Caverns. Other natural landmarks also include the Buffalo National River, which measures 150 miles in length, and the Mammoth Spring State Park.
Other natural sights that Arkansas is known for include the Crater of Diamonds state park. The park has been the site of more than 70,000 diamond discoveries including the largest North American diamond of 40.23 carats. Arkansas is also home to the Quartz Crystal Mines, one of the sites of the best quality quartz veins in the world.
Arkansas is also the site of numerous museums, such as the Arkansas Sports Hall of Fame museum and the Walmart museum. The Arkansas Inland Maritime museum is particularly notable as it houses the 311-foot submarine, the USS Razorback. The Mark Twain cruise and dinner riverboat is also docked on the museum grounds.
Visitors to Arkansas can also enjoy the Van Buren Downtown historic district which is made up of six separate blocks containing art galleries, restaurants, antique shops and other attractions. Another historical district in Arkansas is the El Dorado Downtown district, which is filled with various buildings featuring 1920s and 1930s architecture.