Found across Gujarat, Rajasthan and Delhi, stepwells (subterranean wells which can be approached by a flight of stairs) were usually built to in olden times to seek respite from the summer heat of northern India. Usually built under the patronisation of royal families or wealthy people, these stepwells were often beautified with elaborate architecture, including carvings. Variously known as bawri, baoli or vav, they survive as India’s answer to an air-conditioning system long before the AC machine was invented.