The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This large, circular tomb is the final resting place of the first emperor of Rome.

A collection of objects supposedly singed by the hands of souls in purgatory.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A preserved college lock-up that recalls a clubhouse approach to discipline.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

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

A fascinating insight into daily life in the Eastern Bloc.

An old department store turned Nazi prison turned artist commune.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

A horse statue that receives constant makeovers from graffiti artists and locals.

Launch site for nuclear war against Western Europe.

These crumbling Latvian forts make for some haunting seaside ruins.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

This soviet pilot's graveyard is filled with headstones made of airplane fins.