The road from Thangu to Gurudongmar passes through rugged terrain with moraine, which has high alpine pastures covered with many rhododendron trees.

[5][6] The Sikhs believed Guru Nanak visited and blessed the lake, leading to the construction of a Gurudwara in 1997-1987, which clashed with local Buddhists.

This created anger among the Sikkimese people of the area, who considered the Gurudwara an illegal construction, because their ancient sacred lake had been sanctified by the visit of their Guru Padmasambhava.

Documents furnished to the committee by the Namgyal Institute of Tibetology, Gangtok, agreed with the claim of the local people that it was without a doubt a Buddhist religious place.

The building constructed by the Sikh regiment was then handed over by the Army to the Lachen Monastery on 6 July 2001, in the presence of the Sub Divisional Magistrate, Chungthang, North Sikkim.