This bridge was constructed from the rubble of the infamous Bastille.

This Parisian gem is one of the most incredible ethnographic museums in the world.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A permanent exhibition honors Queen, which recorded seven albums at the casino-based studio, including “Under Pressure” with David Bowie.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Watch cheese-flipping robots in action at this factory and museum.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The natural mummy of the less than chivalrous Knight Kahlbutz.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

A famed artist's inspiring work of peace and tolerance.

This tremendous timepiece was once the largest cuckoo clock in the world.

The final resting place of the famed German pilot, the "Red Baron."

Remnants of a cone-shaped Nazi bomb shelter.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

A Neolithic burial site erected around 3000 BC.