Beautiful in any season, the Nathula Pass is one of the three functioning border posts between India and China. Sitting pretty at a height of 14,140 feet, it is a part of the historic Silk Route. Climb a flight of steep stairs right up to the Indo-China border as you take in the picturesque views from the height. The air up here is thinner, and the terrain is steep. Take time to acclimatize before any further explorations.