This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

A complex of six forts embedded in the Rajasthan hills.

A blooming house of worship for the masses.

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

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

The world's second-largest sundial, made entirely out of stone.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

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

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

Centuries-old bridges grown from tangled roots.

This 15th-century cave complex is one of the very few monasteries to stay open throughout World War II and the Soviet regime.

After Christopher Columbus died, his son built a fancy house to rule from.

Built in 1512, the oldest cathedral in the Americas.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

Remnants of successive wars and Muslim colonialism in the 11th century.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

An abused and forgotten metropolis, abandoned for centuries.