Tadlac Lake, also known as Crocodile Lake, is a small freshwater volcanic maar lake in Barangay Tadlac on the western edge of Los Baños. The lake is set in a quiet, rural area at the foot of the Mount Makiling forest reserve. The shoreline is accessible for fishing, birdwatching, and kayaking — the calm water and forest edge make it a good spot for waterbirds including kingfishers, herons, and ducks.
The lake is less developed as a tourist site than the hot spring resorts, which is part of its appeal. A small community manages basic boat rentals. The drive from central Los Baños takes about ten minutes along the national highway and a short turn toward the lake.