Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

Walk in the footsteps of the gods and straddle two tectonic plates.

Go surfing on this urban wave, "hacked" by local surfers.

One of the most easily accessible examples of the rare 1960s UFO houses.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The only surviving piece of Copenhagen's 16th-century defensive wall.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

How did a lighthouse wind up in the middle of this landlocked German city?

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

A typographic tribute to the many comedic greats who make Great Britain laugh.

Everyone's favorite clay duo immortalized in bronze.

This tower once served as a radar station during the Cold War.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.