Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

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

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A beer pipeline runs beneath Bruges.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

Locals say the stone that marks the spot where the gallows once stood can lead you astray.

This banal Parisian entranceway is not what it seems.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

Most complete collection of Gymnosperms in the world.

Made of 41,900 pieces of mosaic, it took two years to piece together this giant egg.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

Arthur, Merlin, and Guinevere are among the largest and oldest satellite dishes on the planet.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

Cell phone tower constructed entirely of wood.

The stones of this formerly witch-obsessed castle were used to build a church.