Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

A piece of stonework relief commemorates the site where the Devil's rage, and odd apparel, destroyed a house.

Christ's blood preserved in a Belgian town.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A beer pipeline runs beneath Bruges.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This bell tower is the only one of its kind in the Netherlands and was a symbol of prestige.

The location of the world's first telescope demonstration.

This jellyfish provides clean water for an entire Dutch province.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This demon atop the Notre-Dame de Paris looks utterly bored.

Metal horses galloping through a London fountain provide a link to the city's past.

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

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

This sculpture honors the man who was known as the "Righteous Among the Nations."

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

The world's only museum devoted to the wonders of fluorescence.

A floating cat sanctuary on an Amsterdam canal.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.