Lavish royal estate punctuated with heated greenhouses.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.

This Canadian exhibit with claims as the largest one man taxidermy collection in North America.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

The largest whale museum in Europe allows visitors to walk among life-size giants.

Orcas on display and in the water.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

This natural history museum houses one of the world's largest rat kings, a terrifying jumble of tangled rodents.

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

This giant statue of a vulva became internationally famous after an American exchange student got stuck in it.

At this cemetery, artists are invited to design their own gravestones.

This famed marionette theater and museum is bursting with imaginative string puppets.

The atomic museum in the basement of this German castle displays long strands of replica uranium cubes.

An officers prison camp believed to be impregnable by the Germans saw over 30 successful escapes.

A beautiful collection of taxidermy birds and rare pomological wax models.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

These jeweled relics have a scandalous and contested past.

One of the most easily accessible examples of the rare 1960s UFO houses.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

The name doubles as an appropriate adjective for this small ossuary.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

The first (but not only) upside-down house in Germany.