The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Final palace complex of the last of 29 Kokand rulers.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Whitewashed mosque contains the world's largest carpet.

A rebuilt Roman city that was once the largest Roman settlement in the region.

The kitsch mansion of the former Romanian president Nicolae Ceaușescu features a golden bathroom.

Inaugurated three times, this tower offers some of the best views of Madrid.

An architectural marvel that combines Gothic architecture with Indian elements.

This cupola was once seen as an architectural disaster.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Huge stairway leads to this massive gallery.

Within the Dadès Gorge, amazing vistas and towering cliff faces can be seen at each new curve and bend in the road.

This record setting conveyor belt system can even be seen from space.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

Rocky Atlantic beach home to a stunning stone arch.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."