This church carved into the rocks is full of enchanting stone statues.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A restored, one-room African-American schoolhouse in the diva's hometown now preserves the legacy of its most famous student.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

Admire impressively detailed models of everything from a Pennsylvania Dutch kitchen to the world's smallest Swiss Army Knife.

The oldest building in Madrid.

Gladiators once walked this ancient, subterranean passage.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

The legendary building that needed ghostly approval before being built.

A tiny church on a man-made island in the Adriatic.

A faux European lane smack dab in downtown L.A.

Organisms normally seen under a microscope decorate this church.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

Nikola Tesla's former home contains an homage hidden from plain sight.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This striking Victorian Home with its 113-foot turret is best known as the site where abolitionist John Brown was executed in 1859.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.