The world's largest fully steerable radio telescope.

Nothing says indulgence like a 1,500-pound chocolate castle.

Roma who struck it rich in the 1980s built extravagant mansions in this small Romanian town.

This psychedelic tourist trap is a leisurely descent into madness.

This public space is speckled with the eerie remnants of a defunct amusement park.

For decades, it has disappeared and reappeared as water levels rise and fall.

The largest self-built castle in the U.S., six decades in the making.

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

Memorializing an American tragedy of massive proportions.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

An abandoned town is hidden in Great Smoky Mountains National Park.

Learn all about this iconic air rifle without putting an eye out.

Mile-long cave system near Great Smoky Mountains.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.