Explore the quarry where the marble was sourced for Michaelangelo's David.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Once an ancient Roman bath, now a hotbed of geothermal energy and a hub for energetic innovations.

Scores of wax baby figurines add an unusual mood to this beautiful church on the Greek coast.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This bridge was constructed from the rubble of the infamous Bastille.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This peaceful, round shrine in the middle of the Sri Lankan jungle acts as a beacon of peace.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.