Laguna de Baý (; ) is the largest
lake in the
Philippines located east of
Metro Manila between the
provinces of
Laguna to the south and
Rizal to the north. The
freshwater lake has a surface area of 911–949 km² (352-366 sq mi), with an average depth of about and an elevation of about above sea level. The lake is shaped like a stylized 'W', with two
peninsulas jutting out from the northern shore. Between these peninsulas, the middle lobe fills the large volcanic
Laguna Caldera. In the middle of the lake is the large island of
Talim, which falls under the jurisdiction of the towns of
Binangonan and
Cardona in
Rizal province.