7. Tilicho Lake TrekNestled carefully in the Annapurna range, the Tilicho Lake is a high altitude lake in Nepal that is unexplored. The lake is so isolated that you will find no settlement anywhere close to it. Trekkers who attempt the Annapurna Base Camp trek use this route, other than the more treacherous one, which requires an overnight halt in nearby villages. The scenery of the Tilicho Lake cannot be compared with any other lake in the world.