This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

The largest whale museum in Europe allows visitors to walk among life-size giants.

The oldest church in Iceland is one of the few to feature ornate decoration.

A winding, blood-red tunnel of hardened lava navigable by foot.

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

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

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

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

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

An encyclopedic collection of mammal penises.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Staves, storm-calling, and of course, necropants.

Rising from the sea like a stone monster.

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

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

Limestone grottoes turns everyday objects into stone.

Beneath the city of Lourdes, France is a massive, concrete church.

This French anatomy museum greets guests with a skinless man, mid-shovel.

Home to the "Rat King" of Nantes and other wonders of the natural world.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.