Rumtek Monastery (rum theg dgon pa), also called the Dharmachakra Centre, is a gompa located in the Indian state of Sikkim near the capital Gangtok. It is a focal point for the sectarian tensions within the Karma Kagyu school of Tibetan Buddhism that characterize the Karmapa controversy.Originally built under the direction of Changchub Dorje, 12th Karmapa Lama in the mid-1700s[1], Rumtek served as the main seat of the Karma Kagyu lineage in Sikkim for some time. But when Rangjung Rigpe Dorje, 16th Karmapa, arrived in Sikkim in 1959 after fleeing Tibet, the monastery was in ruins. Despite being offered other sites, the Karmapa decided to rebuild Rumtek. To him, the site possessed many auspicious qualities and was surrounded by the most favorable attributes. For example, flowing streams, mountains behind, a snow range in front, and a river below. With the generosity and help of the Sikkim royal family and the local folks of Sikkim, it was built by the 16th Karmapa as his main seat in exile. After four years, construction of the monastery was completed. The sacred items and relics brought out from Tsurphu Monastery, the Karmapa's seat in Tibet, were installed. On Losar in 1966, the 16th Karmapa officially inaugurated the new seat, called "The Dharmachakra Centre, a place of erudition and spiritual accomplishment, the seat of the glorious Karmapa."

Nathu La ( Nǎiduīlā Shānkǒu) is a mountain pass in the Himalayas in East Sikkim district. It connects the Indian state of Sikkim with China's Tibet Autonomous Region. The pass, at 4,310 m (14,140 ft) above mean sea level,[1] forms a part of an offshoot of the ancient Silk Road. Nathu means "listening ears" and La means "pass" in Tibetan.[2] On the Indian side, the pass is 54 km (34 mi) east of Gangtok, the capital of Sikkim. Only citizens of India can visit the pass, and then only after obtaining a permit in Gangtok. Nathu La is one of the three open trading border posts between China and India; the others are Shipkila in Himachal Pradesh and Lipulekh (or Lipulech) at the trisection point of Uttarakhand–India, Nepal and China.[3] Sealed by India after the 1962 Sino-Indian War, Nathu La was re-opened in 2006 following numerous bilateral trade agreements. The opening of the pass shortens the travel distance to important Hindu and Buddhist pilgrimage sites in the region and was expected to bolster the economy of the region by playing a key role in the growing Sino-Indian trade. However, trade is limited to specific types of goods and to specific days of the week. Distant mountains of Bhutan, the Tibetan side, and international border fence as seen from the Indian side at Nathu La It is also one of the five officially agreed Border Personnel Meeting points between the Indian Army and the People's Liberation Army of China for regular consultations and forms a part of an offshoot of the ancient Silk Road. Nathu means "listening