A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

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

A diminutive statue that was inspired by the sculptor's own daughter.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

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

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

The only natural cave bath in all of Europe.

This one-time health resort was used by aristocrats around the world.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A whimsical bridge adorned with decorative dragons.

Outside of Budapest, a reconstruction of a 16th-century fortress.

Budapest's Communist-era statues, banished to the suburbs.

You've probably seen these distinctive orange-tiled columns on the big screen.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

300 years of pharmaceutical history on display.

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

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