Trek to the summit of mt rinjani on this 4 day small group guided hike from either senaru or sembalun village mt rinjani is the second highest volcano in indonesia and is still active you will have amazing views of glistening sunrises and sunsets you may even see the milky way on a clear evening you will trek up to the senaru sembalun crater rims take a swim in the hot springs and lake before descending down through the tropical rainforest the next day