The attic of a four-century-old canal house hides a clandestine church.

18th century opera in its original splendor.

Sweden's "good old days" painstakingly re-created in a model village.

The internet as provided by a James Bond villain.

It houses the remains of a 17th-century version of the Titanic.

Guests become prisoners on a visit to Latvian prison.

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

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.

This abandoned Slovenian military barracks has become a punky-political art squat.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A fascinating insight into daily life in the Eastern Bloc.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Every equinox this Maya pyramid puts on a spooky ancient light show.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

World's most expensive home.

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

A saintly relic hidden in a Prague church basement.

Monument to a suicide protesting the Soviet invasion.