A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

This church is dedicated to the patron saint of seafarers.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Scores of wax baby figurines add an unusual mood to this beautiful church on the Greek coast.

An abandoned Byzantine fortress and notorious prison.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

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

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The hallucinogenic center of the ancient world.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.