This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Private collection of art inspired by cabinets of curiosity.

A gargantuan crystal kingdom.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A heavenly experience, right here on Terra Firma.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A Hawaiian stairway to heaven—that you can't climb.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One person's lost luggage is another person's treasure.

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

This South London cemetery holds the remains of more than 15,000 people.

An homage to everyone's favorite prehistoric cartoon family.

An Aztec snake god has taken the material form of an apartment complex.

Every autumn, this hillside is ablaze with red summer cypress.

A 30-acre garden inspired by the principles of modern physics.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A winding path built in secret on the edge of the continent.