Micro-nation based around a nine-story high illegally built tower.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

This outsider art house has gone from clinical creation to astounding artwork.

Physicist’s epitaph provides final confirmation to a career of turmoil.

The topiary maze at the Habsburg hunting lodge.

A spherical "micro-nation" in the heart of Vienna.

Macabre museum devoted to historical Viennese murders.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Museum devoted to the artificial language of Esperanto.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

Digger attempting to hide itself under 300 tons of rubble.

Four alabaster giants contemplate the tides on the shore of Denmark.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

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

A lone pole once used to display a man's corpse now stands empty, but the memory remains.

Derelict chemical plant on the North Sea is a beautiful industrial ruin.

A vortex fountain that seems to rise out of the ground.

After he picked up a brush at the age of 47 this simple barber turned his entire home into a canvas.

This indiscriminate collection of audio antiques is trying to preserve the history of the audio industry one vintage appliance at a time.

A tiny, picturesque island, where cows and wild horses wander around the houses.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

A unique opportunity to stay the night in retrofitted sections of sewer pipe.

Artistic cabins actually grow deep in the Canadian wilderness.