The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

Ancient structures used to make and preserve ice in the deserts of Persia.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

The palace of the King of Kings, burned by Alexander the Great.

Over 3 miles up in the Himalayas this pass is one of the highest drivable roads in the world.

There are millions of temples in India, but only one prominent temple dedicated to the Hindu creator god.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

A startling, centuries-old subterranean marvel hides in plain sight.

Rock-cut cave complex filled with ancient Buddhist artwork.

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.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This medieval citadel once guarded the western entrance of the Pamir Highway.

This ancient Silk Road outpost overlooking the Wakhan Valley is miraculously still standing.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Lonely minaret stump of a destroyed city.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

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

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

A white Buddhist temple with a golden restroom.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.