Lake Maninjau is a caldera lake in West Sumatra, formed thousands of years ago by a volcanic eruption that left a roughly oval depression 16 kilometres long and 8 kilometres wide. The road into the lake basin descends through 44 tight hairpin bends off the crater rim, with dramatic views over the water below.
The lake is popular with travellers looking for a quieter alternative to the crowds of Bukittinggi, about 35 kilometres to the east. Accommodation is concentrated along the western shore, with a string of simple guesthouses and bungalows. The water is calm enough for swimming and fishing; the surrounding hillsides are worth exploring on foot or bicycle. Some guesthouses along the shore create makeshift "beaches" using white sand — the lake is freshwater rather than sea, but the setting is pleasant.
Maninjau is a good base for day trips into the wider Minangkabau highlands — Bukittinggi, the Pagaruyung Palace at Batusangkar, and the dramatic Harau Valley are all within reach. The area around the lake is also home to coffee mills and small farms where you can get a sense of Minangkabau agricultural life.