A church filled with the bones of hundreds of virgins martyrs—or so they say.

This "floating railway" is one of the world's oldest monorail systems.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

This poignant tribute to the White Rose movement showcases artifacts related to the heroic anti-Nazi struggle.

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

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

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

The topiary maze at the Habsburg hunting lodge.

The solemn exterior conceals an opulent interior of this 17th century church.

This 13th century Gothic brick castle is the largest in the world by surface area.

An underground city of salt.

Inside this Krakow church, an explosion of psychedelic color.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

A historic observatory precariously perched at the "Top of Europe."

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The scars of World War II are preserved on its walls.

A unique bridge with an equally unique view.

King Ludwig I's collection of beautiful women.