One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

At the time of its completion, it was the tallest dam in the world.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A Memphis park where you can walk the whole Mississippi River in one go.

Elvis's own personal tropical hideaway.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

Built to bless whalers before their voyages, this Massachusetts church now features a ship-shaped pulpit.

A museum dedicated to Nantucket's legacy as the "graveyard of the Atlantic."

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

The largest island on the great salt lake is home to curious creatures and strange stories.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

This Moab institution functions as both a rock store and a small natural history museum.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

After becoming locally extinct, this esteemed avian now flies free in the forests around the ancient ruins.