One of the most important yet well-hidden museums dedicated to the history of medicine.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The underground sanctuary of a mysterious ancient cult.

An alchemist's "magic door" stands in the middle of a Roman park.

Architectureal fantasy quarter of Rome.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

This museum houses an imposing skeleton army comprised of creatures great and small.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

The oldest stone house in Paris was built by its most famous alchemist.

Pick up this rock and become an instant legend.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A fantastic reconstruction of a 10th-century Viking longhouse.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

Iceland's first pagan temple in 1,000 years is underway in Reykjavík.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

This replica Viking village was created for a film that was never shot and is now open to visitors.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

An encyclopedic collection of mammal penises.

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

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

Rising from the sea like a stone monster.

Medicinal spa created with the discharge from a geothermal energy plant.