This small but lovely sinkhole lake is the last remnant of a great prehistoric water basin.

A beautiful 1920s tower filled with local hidden gems.

Some of the best Persian food in New York comes from the front window of an unassuming pizza shop.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

The ruins of an abandoned church loom within a picturesque Ukranian village.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

This demon atop the Notre-Dame de Paris looks utterly bored.

This Art Deco theater is the last remaining opera house in the “little Broadway of the North.”

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Rare remnants of the brick-domed ovens birthed in the Durham coalfield during the Industrial Revolution.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Colombia's biggest botanical garden contains plants from all across the country.

The sunlight passing through the opening of this huge cave system creates a magical effect.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

This quirky shop on a former farm is full of weird and wonderful oddities and antiques.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

This tremendous timepiece was once the largest cuckoo clock in the world.

A collection of miniature, symbolic sculptures hides in plain sight across Kyiv.

This unique competition celebrates an American Indian and Canadian First Nation cultural tradition.

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.