Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

The famous winding walk at Chartres is surrounded in mystery and myth.

This church sits upon a peaceful hill and a long, turbulent history.

A Gothic cathedral created from volcanic rocks.

World's largest cave was only discovered in 1991, and now offers tours to the public.

A complex of six forts embedded in the Rajasthan hills.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

This indoor ski resort has a mountain contained inside a mall.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

The world’s largest LED display, built over an F1 race circuit.

This giant underground cave chamber can only be accessed through a small opening at the top.

The former Willingdon Airport started operations in 1929, in India's capital, Delhi. Now, it's used for maintenance runs and helicopter rides.

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

Sacred Buddhist home of some spiritual monkeys.

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

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

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

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

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

This experimental utopian "city of the future" in rural India may hold a dark secret.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.