A floating cat sanctuary on an Amsterdam canal.

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

A public urinal so pretty, it was declared a national monument.

The closed and crumbling Francoist luxury resort for workers is still full of life—for now.

One of the best-preserved, yet least visited stone circle sites in Cumbria.

This tower was created by the area's vicar as a shelter for exhausted travelers, complete with a fireplace and breathtaking views.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

An ancient hotspot for spotting schools of fish.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

This ruined 15th-century hermitage is steeped in myth and mystery.