Duenmang Tshachu or Duenmang hot spring is situated under Nangkor gewog, under Zhemgang Dzongkhag. It is situated at the bottom of a deep narrow valley. It is about a 1 hour walk down hill from the nearest road head. There are about five bathing troughs. It is believed that taking a bath in the hot spring cures many diseases like TB, Rheumatism, Gastritis etc.