This underground art installation recreates an ancient date honey storeroom.

"Holy Wisdom" overlooks the city that became its namesake.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This prefabricated building was built in Belgium and shipped to Mozambique but was never inhabited, since its iron exterior was unsuitable for the tropical environment.

The oldest building in Hargeisa survived the 1988 bombings that destroyed some 90 percent of the city.

A monument to Cuffy, a rebellious enslaved person who became a national hero in Guyana.

This "witch's market" is filled with Amazonian herbs, remedies, and the occasional libido-strengthening tincture.

These markers are used to determine the ground stability of the Strip.

The largest Spanish artifact built in the Philippines and one of the oldest underground reservoirs in the world.

A small, emotionally charged room inside the Mario Testino Museum dedicated to Princess Diana and one famous photo shoot.

This antique rail car has been reborn as an urban cafe.

A monument dedicated in memory of the over 100,000 civilian deaths during the liberation of Manila in World War II.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Sail in for a ’dam good slice.

The remnants of what was once the largest film studio on the East Coast are hiding in plain sight.

This saucy statue once caused outrage among locals.

This massive blockhead sculpture hides an entire library.

A mysterious architectural gem in one of the most elegant areas of Buenos Aires.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

An abandoned train station in Munich constructed for the 1972 Olympic games.

An attack on this gunpowder depot led to the start of the Philippine Revolution.

Dedicated to a legendary spiritual vision.

The drawbridge used in the filming of the movie 'Annie' has been in the open position as it was in the movie for decades.