Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A giant interactive periodic table with real samples of the elements.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

The first (but not only) upside-down house in Germany.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Not quite the menace it once was, this monster still has some chops.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A museum befitting the city responsible for supplying the majority of the world's LSD.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A staggering collection of satellite models and actual flight parts.

A natural arch offers panoramic views of Yangshuo's karst hills.

A canvas of crops grow from vibrant red soil in this terraced farmland.

This abandoned fishing settlement may well be the greenest village in the world.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Eighty million natural history specimens call this gargantuan museum home.