A stealthy Apache hideaway that became the haunting site of a mass grave.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The first declared National Monument in the United States.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

A cemetery housing wild west legends in South Dakota.

A fitting attraction for the corn capital of the world.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

Just a man taking his prehistoric pet for a stroll.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

These markers are used to determine the ground stability of the Strip.

Designed to not only to represent the history of the local community but also, the future.

It's said that this stone with its mysterious runic inscription is evidence of the Norse visiting Narragansett.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The origin of these small islands' sweet names is a local mystery.

The site of the largest mass execution in Rhode Island history, haunted by the ghosts of hanged pirates.

A gothic-styled structure that has been the location for several movies.

A work of art that pays homage to a Victorian timepiece in Providence.