The only diamond mine in the world where you can keep what you find.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

One of America's first planned communities is preserved in a state park.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

One of the best places in Florida to spot rare, carnivorous pitcher plants.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

World's largest cave was only discovered in 1991, and now offers tours to the public.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

An enormous Buddha peers through a gap in its ruined chamber.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

The golden Buddha statue at the Wat Muang Monastery is the tallest in Thailand, and the ninth-tallest in the world.

The cursed island of black pebbles.

Stunning wetlands ablaze with pink lotus flowers.

A battle between nature and architecture in the Cambodian jungle.

Buried in the Laos jungle is a sanctuary for bears that would have otherwise been milked to death by poachers.

This remote island known for its balancing boulder may have inspired Peter Pan's Neverland.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.