Lake Tama
Lake Tama is an artificial lake in Higashiyamato City, in western Tokyo, right at the border with Saitama Prefecture. It was formed by damming up a river running through the Sayama valley, a project started in 1916 and completed in 1927. The lake now serves as a water reservoir for the residents of Tokyo.
The lake is surrounded by parks and forests and there is a popular cycling course extending from Nishitokyo City to Lake Tama. North of the lake towards Lake Sayama lies the Seibu Dome, home of the Saitama Seibu Lions baseball team. Also worthy of a visit are the buddhist Yamaguchi Kannon Konjoin (山口観音 金乗院) and Sayama Fudoson (狭山不動尊) temples.