Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The land is home to swimming ponies and a legendary 18th-century treasure.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

Stunning Roman aqueduct used for 1900 years and still standing.

This "floating railway" is one of the world's oldest monorail systems.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

Elevated freight railway turned wildly successful urban park.

The site of the climactic scene from the classic horror film is now a historic landmark.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

An unexpected desert oasis in South America.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

The large collection of pre-Columbian pottery might make you blush.