One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The world's largest Holstein cow.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

Home to the deepest rift anywhere on Earth.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This extraordinary geological oddity resembles human-made pavement.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

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

This gold-winged spire celebrates the first true flight around the world.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Old submarine parts have been converted into faux whale fins.

The longest and widest floating bridge in the world.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

A unique geological area spiked with wind-carved rocks that resemble teepees.