This rare basalt crater lake is used to study the Moon and Mars.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.

A complex of six forts embedded in the Rajasthan hills.

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.

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

These medieval funerary monuments are now home to a colony of critically endangered vultures.

This weekly bazaar started in the 1960s as a way for hippie travelers to barter their goods.

Time has stopped at the house where Gandhi died.

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