Wikipedia says: Rabdentse was the second capital of Sikkim. It was shifted from Yuksom in 1670 by Tensung Namgyal, the second Chogyal (monarch). However, Rabdentse was too close to the Nepal border, which had cold relations with Sikkim. After repeated raids on the capital by the Nepalese in the 18th century, the capital was shifted further inland to Tumlong in 1793 by Tshudpud Namgyal, then Chogyal. The ruined capital is surrounded by thickly forested valley. It is nearby Pemayangtse Monastery. Rabdentse has also a bird sanctuary. This monument is declared to be of national importance by the Archaeological Survey of India.
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