This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

The world's northernmost ice hotel.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

The world's largest reflecting pool is just two centimeters deep.

This picturesque ghost town is located on the banks of the Suwannee River.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

This pun was simply waiting to come to life, and one defense contractor made it so.

This historic mansion was built as a symbol of love between a husband and wife.

A winding, cliffside stretch of road overlooking the Delaware River.

A grand imperial capital left to fall into magnificent ruin.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

Because sometimes the most efficient route from A to B isn't a straight line.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This impressive clifftop temple was once at the center of an international custody dispute.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.