Musanze Cave is a rather young lava cave in the Albertine Rift Valley. The volcanism started here with the Cretaceous 65 Million years ago, and is still going on. The cave was formed by a lava flow from the Bisoke and Sabyinyo volcanoes. It has a huge, 10m high, entrance portals and a length of two kilometers. Multiple roof collapses, which are common for lava caves, make a total of 31 entrances.
