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

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

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

A silly medieval mural preserved on the side of a Viennese house.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The largest fountain in Bratislava.

A small square plaque marks a failed assassination attempt that could have changed history.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

A fearsome dragon clings to a corner of Munich's city hall.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Legends surround an ancient tree trunk riddled with nails for good luck.

The resting place for anonymous victims of the Danube's dark waters.

The final resting place for the remains of 143 Habsburg royalty.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

When it comes to handsignals (and colonialism) rock always beats scissors.

Perhaps the most scandalous statue of America's first president.