The building's fluid, wavelike walls are a true feat of architectural ingenuity.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Where commuters walk through remnants of an ancient Greek necropolis.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A WWII museum that tries to reenact history.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

A narrow strip of land is home to the tallest migrating dunes in Europe.

This micro-nation may be some sort of prank, but its constitution sure seems official.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

A black cat protests the City Guild in Riga's Old Town.

Guests become prisoners on a visit to Latvian prison.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A shrine of fire worship built on top of a natural flame.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Mysterious hillside with a continuously burning natural fire.

A gigantic collection of teeny, tiny books.

These Stalin-era industrial 'death traps' hang lifeless above the city

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Small church on top of a huge rock column.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Real bones which are said to have belonged to a Polish dragon.