One of Amsterdam's narrowest houses is located right across the canal from its widest.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Europe's official "zero-level," the equator of elevation.

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

A floating cat sanctuary on an Amsterdam canal.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

The last of Amsterdam's original sea level markers remaining in place.

Where royalty waits in the height of luxury.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

A curious collection dedicated to human and animal anatomy and pathology.

This restaurant combines two Finnish traditions in one place: warm-weather relaxation and outdoor carpet-cleaning.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

An abstract monument to a symphonic composer.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

The first transatlantic wireless signal was received at this 17th-century fort.

A World War II gun battery sits at the easternmost point of North America.

“And the Lord said unto Johan, build for thee an ark for the end of the world is approaching.”

The tallest mountain in mainland Netherlands isn't actually very tall.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

This giant wire frame man sculpture is crouched in contemplation.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

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