Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

Museum dedicated to the terror regimes of Hungary.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

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

Electrical curiosity museum housed in an old transformer station.

A forgotten graveyard lost in the tangles of an overgrown garden.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

A surreal statue honoring Prague's favorite literary son.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.