Nathula pass is the border between India and China, which was closed now. For visiting this, you have to take permit from Military through a travel agent. You have to submit your Voter ID and you passport photo to get the permit.
Nahtula pass is about 4,310 m above mean sea level, so the oxygen availability is low. Not recommended for aged people and heart patients. It forms a part of an offshoot of the ancient Silk Road which was closed now. It is one of the three open trading border posts between China and India.
You can see both the gates of India and China’s. But photography is prohibited here (but saw many clicking). You have to climb around 50 steps to see the gates. Please carry popcorn packets when you visit Nathula(). Eating Popcorn somehow helps you not getting any breath problems. (Yes, it helps). There you can find a canteen. A hot chai at those freezing cold temperature helps u. Don’t forgot to carry thick warm clothes and other woollen things to withstand those low temp.