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

Traditional 11th-century outdoor tannery.

The other side is actually green.

One of the most spectacular canyons in the world.

Morocco's Argania trees are infested with nut-hungry goats.

A hidden subterranean installation offers a view of the sky.

Olfactory delights in San Francisco's Botanical Gardens.

Art in the form of a winding, man made crack in stone.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

This shop specializes in oddities and Victorian-inspired wonders.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A huge musical instrument played by the ocean.

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

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

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

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

The record holder for the world’s largest peach.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

This tangled English forest looks like something right out of a fairytale.

This strange geological landscape erupts with sudden bursts of water.

The glacier tucked within a New Zealand rainforest.

Tubing through a cave lit with glowworms is a magical underground experience.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.