Global Volcanism Program | Image GVP-06388
Wai Sano, the westernmost Holocene volcano on Flores Island, contains a 3.5 x 2.5 km caldera with a lake. The SE caldera wall truncated the slopes of Poco Sesak (also called Gunung Cerak), and the low point on the caldera rim is on the E side. Two solfataras are located at the SE shore of the lake.
Photo published in Kemmerling 1929, "Vulkanen van Flores" (courtesy of Volcanological Survey of Indonesia).