Taj Mahal - Water for the Taj Mahal was provided through a complex infrastructure. Water was drawn from the river by a series of purs -- an animal-powered rope and bucket mechanism. The water flowed into a large storage tank, where, by thirteen additional purs, it was raised to large distribution tank above the Taj Mahal ground level. From this distribution tank, water passed into three subsidiary tanks, from which it was piped to the complex. A 0.25 m earthenware pipe lies about 1.5 m below the surface, in line with the main walkway; this filled the main pools of the complex. Additional copper pipes supplied the fountains in the north-south canal. Subsidiary channels were dug to irrigate the entire garden. The fountain pipes were not connected directly to the feed pipes. Instead, a copper pot was provided under each fountain pipe: water filled the pots allowing equal pressure in each fountain. The purs no longer remain, but the other parts of the infrastructure have survived.