The social hall of this former factory is a Communist-era time capsule.

A war-torn Olympic relic is being overtaken by graffiti and nature.

This 16th-century mosque is the hallmark of the African architectural legacy in India.

A small town in Rajasthan has been dubbed the "City of Stepwells," and Raniji ki Baori is the queen.

These medieval funerary monuments are now home to a colony of critically endangered vultures.

Picnic on the seashore in the footsteps of ancient kings, protected by giant mythical cat beasts.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Abandoned railway line circling the city of Paris.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

God's Saharan sandbox of wrath.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

One of the most spectacular canyons in the world.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Space-age monument to an early 20th-century uprising.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.