Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

A farm turned upside down.

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

For a moment, you could think there are two identical communication towers in a row, but one of them is made out of PVC.

This Dutch windmill has its roots in an American invention.

The largest collection of the iconic wooden shoe in the world.

The gravestone of a famous poet features a fittingly poetic epitaph chosen by the writer himself.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

The rock carving that became an internet meme.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

This chimerical bridge/tunnel appears to dead end right into the sea.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

This Swiss cemetery is reserved for people who died in climbing accidents.

Natural history museum displaying a famous taxidermied St. Bernard.

This bunny-eared Moses represents an attempted compromise between two biblical interpretations.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Below the altar in Saint-Willibrord Basilica rests the mortal remains of Luxembourg's patron saint.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.