Sebil

A sebil or sabil is a small kiosk in the Islamic architectural tradition where water is freely dispensed to members of the public by an attendant behind a grilled window. The term is sometimes also used to refer to simple unmanned fountains with a tap for drinking water, though other names often exist for such fountains.

Historically, sebils are structures of both civic and religious importance in Muslim cities, most prominently in the cities of the Ottoman Empire, based in Istanbul, and of the Mamluk Empire, based in Cairo. They were built at crossroads, in the middle of city squares, and on the outside of mosques and other religious complexes to provide drinking water for travelers and to assist ritual purification before prayer.

Source: Wikipedia