Nusa Penida is an island southeast of Indonesia's island Bali and a district of Klungkung Regency that includes the neighbouring small island of Nusa Lembongan. The Badung Strait separates the island and Bali. The interior of Nusa Penida is hilly with a maximum altitude of 524 metres. It is drier than the nearby island of Bali. There is very little tourist infrastructure. Nusa Penida, and neighbouring Lembongan and Ceningan islands, are a bird sanctuary.The islands communities have used traditional Balinese village regulations to create the sanctuary. The idea of a sanctuary came from the Friends of the National Parks Foundation (FNPF). Nusa Penida covers a wide area of diving locations, including Penida Bay, Batu Lumbung (Manta Point), Batu Meling, Batu Abah, Toya Pakeh and Malibu Point. The flow through the Lombok Strait is, overall, south-tending, although the strength and direction of the tidal streams are influenced by the monsoon seasons