Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The longest hedge maze in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

The most alien-looking place on Earth.

Surreal riveted sea forts once protected the Kent shores from German attack.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A hands-off space for graffiti artists to hone and display their skills.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

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

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The world's longest known cave system.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Stalactites and stalagmites in a beautifully lit cave.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Walk 2,300 feet above the ground on the "Troll's Tongue."

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

These azure waters were thought to lead to the Mayan Underworld.