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

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A surreal statue honoring Prague's favorite literary son.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

This network of narrow, medieval passages has the most delightful name.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

One of England's most famous churches hides a pair of little known architectural treasures.

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

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Museum dedicated to the terror regimes of Hungary.

The "Little Ones," show Portugal in full miniature splendor.

One of the largest Roman settlements in Portugal.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The corpse bride of Portugal.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.