Geological storytelling.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

This rare volcano spews the strangest and (literally) coolest lava in the world.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

The once-dying town of Sheffield, Tasmania has reinvented itself as a village of painted wonders.

The oldest known university in the world is in Fez, Morocco.

Fine dining 20 feet below the surface in the Indian Ocean.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

Named for the DeFoe novel inspired by a stranded sailor, this island is known for its rare plants and extreme beauty.

Beach instrument turned bed and breakfast.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

This haunted corpse of a drive-in is now a graffiti-covered ruin.

China's mysterious record-setting sleeping Buddha.

Largest cave system in Africa.

An ambiguous ambience emanates from this centuries old leprosy quarantine.

This large round boulder is said to emit spiritual power, but it may just be magnets.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

One of the largest bamboo bridges in Asia, located right next to a bamboo school.