En Prat Nature Resolve in Israel . The spring flows into a natural rock pool, and its output creates a brook that flows all year round. In ancient times, the spring was an important source of water for Jericho. In Hasmonean times an aqueduct carried water from the spring, over which an aqueduct was built in the Early Moslem period. To the east of the spring the remains of aqueducts from the Byzantine period were found, and also the ruins of a flour mill.