There is a very old water storage building in India - a ladder well. From the top down, the well is like an inverted pyramid, and it is very symmetrical, magnificent, and the bottom is filled with dark green fresh water. The climate in India is hot and many ladder wells have been built to ensure a temperature source of water during the dry season. It can not only meet the demand of water supply, but also play a role in summer heat. Now India has many wells, large and small. The largest and deepest well is the Moon Well, a village between Agra and Jaipur. The well in the picture is located in the old town of Jodhpur. Some of today's wells are still playing its usefulness, and some are already a paradise for everyone to swim and play.