A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

Crafted from ocean litter, this sculpture highlights the ills of overconsumption.

A lush oasis full of vibrant plants and striking geometric displays.

This Nebraska town wants to double its population with plywood cut-outs of townsfolk.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

The world's oldest bookshop still in operation.

The scorched Lisbon church that survived two earthquakes and a massive fire.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

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

This secret Australian garden was built on love after a man planted a random bulb he found in the ocean.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

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

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

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

This work of art was designed to represent the Tarpeian Way Quarry that once dominated the area.

The once highest point in China blends symbolic design with a kick of adrenaline.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

A railway station takeout shop sells boxed meals in containers shaped like trains and snowmen that hold the country’s abundant regional delicacies.