A hole in the floor of this chapel is said to have been created by a footprint of the devil.

The fairy tale castle of the "fairy-tale king."

Cell phone tower constructed entirely of wood.

An old slaughterhouse now holds the largest collection of pig artifacts.

This 18th-century folly is one of Europe's rare "garden mosques."

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

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

How did a lighthouse wind up in the middle of this landlocked German city?

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

When you're a great Russian Tsar, even your vomit gets a statue.

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

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

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

A beer pipeline runs beneath Bruges.

Christ's blood preserved in a Belgian town.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

A granite plane marks the site where a French aviator completed the first airplane flight across the English channel.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

A statue paying homage to a world-record-setting aviator who disappeared under mysterious circumstances.

Today, Kent's medieval monarchs hold court on a busy pedestrian thoroughfare—or at least their statues do.

This skewed English house has looked like it's going to fall over for centuries.

One of England's most famous churches hides a pair of little known architectural treasures.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.