Jaisalmer, July 2 -- Would you imagine a school in the middle of a desert? Soaring temperatures would barely let one stay at the same place for a little time. Going to a school would obviously be unbearable.

But, Rajkumari Ratnavati Girls' School is not your regular school building. A structure that could be conveniently called an architectural marvel, it is built with locally cut yellow sandstone. The school is visually impressive, with an oval-shaped structure.

Surprisingly, there is no accommodation of air conditioning to make a school functioning in that climate. How does it work, then? US-based architect Diana Kellogg, who was roped in by Michael Daube, the founder of a non-profit CITTA, explains how.

The elliptical shape of the s...