A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Thousands of well-dressed mummies below a monastery.

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

A Wes Anderson-esque lighthouse that boasts magnificent coastal views.

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

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

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

This rusting remnant of the local herring industry is being given a second life.

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

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

This black church sits alone among a field of lava rock.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Three columns of volcanic rock shoot out of the ocean.