The Annapurna circuit, once an ancient trade route, is one of the most picturesque treks around the world. Depending on how "in shape" you are, it may take you 15 to 25 days to complete this 128-mile horse-shoe-shaped trail.
Highlights of this hike include crossing Thorong La Pass, which has an altitude of 5,416m (17,768ft), and watching the sun rise from Poon Hill, one of the most famous viewpoints in Nepal. For spending the night, you can either camp or stay in one of the many cheap hotels scattered all along the route.