Highly spherical boulders on the shores of New Zealand.

One of the world's steepest streets seems to have houses sliding down it.

Cliffs full of fossils at the portal to England's Jurassic Coast.

A midnight snack that lights up the night.

A fortified city, home to a remaining population of five families

One of the most spectacular canyons in the world.

God's Saharan sandbox of wrath.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Mosaics, storks, and brothels—this ancient city has it all.

Traditional 11th-century outdoor tannery.

The other side is actually green.

The oldest known university in the world is in Fez, Morocco.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Books you don’t need in a place you can’t find.

An intricately carved Viking church overlooks a glistening fjord.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

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

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

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

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