A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An exquisite tunnel of cascading flowers.

A psychedelic labyrinth on the San Francisco bay.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Stockholm's deepest subway station is also a stunning ecological wonder.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

A hidden art gallery in an abandoned Warsaw fort.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

This massive library holds what was once the largest book collection in the world.

Where old school Polish Chicago and young hipster Chicago live side by side.

A speakeasy takes on Chicago's drinking culture.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

Modern art meets modern convenience in possibly the world's most architecturally important public bathroom.

Deadly scalding and one of the largest hot springs in the world.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.