From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Once the home of a hermetic monk, this cave now houses a small church.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

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

Scholar, adventurer, saint, and instigator of the Goa Inquisition.

This bright pink Gandhi memorial was built so that sunshine hits a specific spot on his birthday.

Ornate, dome-topped cenotaphs fill this royal crematorium.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

This 17th-century mausoleum is topped with an acoustic marvel.

An ancient iron pillar in Delhi that seems to be rustproof.

Modest by day, illuminated majestically at sunset.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

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

Rock-cut cave complex filled with ancient Buddhist artwork.

The remains of what was, not so long ago, the world's largest city.

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.

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 mummified relic of St. Antoninus.