We totally loved this adventure to base camp of Annapurna, which is 10th highest mountain in the world. We trekked through different scenery every day, and the views were breathtaking. Lots of stairs, but the teahouses fuel you up well and properly to take them on, and the Annapurna Sanctuary was ABSOLUTELY worth the effort when you get there. Bring warm layers and a pack of cards for the evenings.