A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

Where the lovelorn find a home for their sentimental keepsakes.

An unlikely hit, this museum is dedicated to the inventor of instant ramen and cup noodles.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

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

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

Climb to the top of its spiral spire for spectacular views of Copenhagen.

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

Copenhagen's celebrated theme park and gardens.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Iceland's largest lagoon is home to stunning multi-colored icebergs.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An encyclopedic collection of mammal penises.

The most powerful waterfall in all of Europe.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

This elegant arc of a waterfall marks a religious turning point.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.