Military-wise, the district is a very sensitive area with the Indian army having control over most areas east of Gangtok and near its borders with People's Republic of China and Bhutan. Visitors to this region are restricted and just a few areas are open to tourists in the areas east of Gangtok. Popular tourist locales are the Tsongmo Lake, Baba Mandir and the Nathu La pass. The pass formed the offshoot of the ancient Silk Road which connected Lhasa to India. The pass and Baba Mandir are open to Indian nationals only. To enter this region a special permit is required; the Inner Line Permit has to be obtained one day prior to departure. This permit is made through local tourist offices. Other tourist areas include the town of Gangtok, the Phodong Monastery north of Gangtok and the Rumtek Monastery. Other special attractions in the Capital City Gangtok are M G Marg, Hanuman Tok, Ranka Monastery, Himalayan Zoological Park, Palzor Stadium, Tashi View Point. Zuluk And Gnathang Valley are famous attractions in East Sikkim.