This virtually windowless mass of smooth concrete is the only Catholic church in the city.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

Moss and stone turn this waterfall into an otherworldly liquid veil.

The figure atop this globe is from a Serbian play about a merchant's travels around the world.

Located in a veterinary school, this macabre exhibit displays the effects of animal diseases.

This ice cream parlor serves scoops of flavors like rakia, medlar, and poppy seed.

This massive library holds what was once the largest book collection in the world.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

Cathedral carved out of salt, located a mile below the earth's surface.

This unusual monument shows a naked Simón Bolívar stripped of clothing, medals, and swords.

Enchanting cave with a river crashing through the roof.

Ripped apart by a bomb in 1993, the shell of Pablo Escobar's infamous vacation house still stands.

What was once the longest suspension bridge in Latin America was directly inspired by the iconic Brooklyn Bridge.

This exceptional home was a 32-year labor of love by a man determined to build his wife the most beautiful stone house in the world.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

These azure waters were thought to lead to the Mayan Underworld.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

A flooded Mexican cave that hides a river beneath the water.

Take a dip beneath the stalactites in this amazing cenote.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

This small, ingenious cannon once helped regulate Parisian life.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.