This ancient trail has claimed the lives of over 2,000 people.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Houses are tucked between, on, and underneath giant boulders.

An unusual vending machine designed to support mourners during funeral ceremonies at Zurich's largest cemetery.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

At high tide this strange footbridge appears to have no purpose whatsoever.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

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

Gorgeous purple flowers drape from the world's largest blossoming plant.

This constantly evolving art space saved an Italian town from its own crippling reputation.

Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.

Italian cave with exceptional acoustics and an unsavory history.

Volunteer-run library dedicated to exploring five decades of activism history.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.