Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

A collection of old neon signs from all over Poland line a secluded courtyard.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

This is the oldest Roman-made bridge in the city still existing in its original state.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Architectural monsters are devouring this palace's every door and window.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

When the rain falls, this drain system turns into a musical instrument.

One part local history, 99 parts gruesome haunted house.

The naturally mummified body of a peasant girl saint.