This Danish castle is supposedly haunted by a woman too independent to not be a witch.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

A mocking tribute to the past and modern leadership of Prague.

This artificial cave looks like something out of a fairytale.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Walk through Czech history in Prague's largest graveyard.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Countless grotesque faces stare out from this eerie Prague art wall.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

A fearsome dragon clings to a corner of Munich's city hall.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A national collection of Communist-era musical posters.

Warsaw's fantastically preserved gasworks...almost.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

The site of the first battle of World War II.