The Balathandayuthapani Temple, officially the Arulmigu Balathandayuthapani Kovil, and better known as the Waterfall Temple or Hill Top Murugan Temple, is one of the oldest Hindu temples in Penang. It was originally located within the grounds of the Penang Botanical Gardens.
According to popular belief, a sadhu (holy man) chose a spot close to the waterfalls for a shrine dedicated to Murugan. The place was called thanner malai, meaning water hill, and the deity itself was known as Thannermalaian, or "he who resides by the waterfall".
This original site is as old as the founding of George Town itself. It was the site of the Balathandayuthapani temple until 1850, when the authorities took over the area to establish the Botanic Gardens Reservoir. That was when the temple moved out, leaving at its original site a small shrine.