Dig for your own trilobites in this goldmine of invertebrates.

Cliffs full of fossils at the portal to England's Jurassic Coast.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This ceremonial mound is one of the first officially recognized Native American historical sites in North Carolina.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

This dramatic rail curve was once the target of a failed Nazi attack.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.