This splendid tomb may look fantastic, but there's nothing in it...

Apartment complexes built into huge repurposed natural gas tanks.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The world's oldest known salt mine.

Op-art architecture designed for happiness.

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

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Giant, friendly pelicans in Central London, the most unlikely of places.

Countless grotesque faces stare out from this eerie Prague art wall.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A mocking tribute to the past and modern leadership of Prague.

Go surfing on this urban wave, "hacked" by local surfers.

Southern Italy's spinning top village.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

The only museum with its curator—and her pets—buried inside.

Europe’s oldest natural human mummy.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The world's most important buildings shrunk to a tiny size.