A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An eerie, derelict amusement park in Berlin.

A beautiful and moving memorial set on a little island in the middle of the river in Minsk.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

The mummified relic of St. Catherine sits forever on a golden throne.

Southern Italy's spinning top village.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Bell tower juts out from a village buried under a lake.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

One of the largest caves in the world open to the public.

Virgil's many-mouthed gateway to the underworld.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

The largest park in Lviv is surrounded by a network of disused rail tracks.

Featured in one of the most iconic scenes in cinema history.

One of the largest remaining ancient burial mounds of the 10th century.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

This hill is known for its connection to the occult in Slavic tradition.

The ruins of an abandoned church loom within a picturesque Ukranian village.

The largest catacomb system in the world.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.