A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

Only a few walls remain of the last church the Pilgrims used before they sailed to North America.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

A former plague hospital turned medical museum.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

A hugely vast Irish landscape of barren rock that stretches for miles.

One of the U.K's earliest public water supplies is within the "plague village."

This jellyfish provides clean water for an entire Dutch province.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

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

Oldest Museum of the Netherlands is a true cabinet of curiosities.

Colorful and chaotic stacked hotel in North Holland.

The longest eruption in the history of La Palma originated with this volcano in September 2021.

The world's largest single-aperture telescope resides in the Canary Islands.

The largest salt farm in the Canary Islands is located at the foot of an active volcano.

These wooden balconies that are both decorative and functional.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

You can soak in three relaxing pools filled daily by the tide.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

A solid steel plane designed to catch fire over and over again.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

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

A unique work of automotive art calls this shopping center home.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.