Taal Lake (Tagalog: Lawa ng Taal, IPA: [taʔal]), formerly known as Bombón Lake, [2][3] is a fresh water caldera lake in the province of Batangas, on the island of Luzon in the Philippines. The lake fills Taal Volcano, a large volcanic caldera formed by very large eruptions between 500,000 and 100,000 years ago.