According to legend Guru Rinpoche meditated on the giant rock with his two consort Khandro Yeshe Tshogyal & Khandro Mandarava in 8th century & left footprint on rock. There is also footprint of Lhacham Pemasel on rock. She was the daughter of King Thisongdetsen a great Buddhist King of Tibet in 8th century. She came to pilgrimage along with Guru Rinpoche & believed that she died in Rimochen. Her death body was concealed inside the rock with mystic treasure nsmed as "The mystic keys to future".

The Lhakhang was built by Tertoen Pema Lingpa in 15th century right under the cliff. The establishment of Lhakhang was predicted by Kuenkhen Longchenpa a great Nyingma master, who had seen in the vision. The place was visited by tertoen Dorji Lingpa Lingpa, who had started descendant in Tang Ugyenchoeling. His descendant, Trongsa Penlop Tshokey Dorji in 19th century had restored Lhakhang. Tertoen Sherab Mebar visted place in 13th century & discovered text called Gyud Bum Chung(Little Son Tantra) from box buried under the crevice of a rock infested with a snake. Tertoen Pema Lingpa had discovered treasures from the rock, the image of Buddha and religious text. The place was visited & blessed by other great Buddhist masters.

The Lhakhang is two storeys traditional Bhutanese temple, with ground floor used for social functions & upper floor has two Lhakhang. There are statues of Guru Rinpoche, Zhabdrung & Lhamo Rematey the protective deity of Lhakhang. There is valued beautiful wall painting of Yogi Milarepa(12 Century), Guru Rinpoche in Zangdoperi, Guru Tshengye(Eight menifestation of Guru Rinpoche), Gampopa & Zhabdrung Ngawang Namgyal.

There are hand prints of Guru Rinpoche & his consort. Footprints of Lhacham Pemasel & footprints of different animals on the rock behind the Lhakhang. There are several Zambala(wish fulfilling stones) sacred symbols & invisible doorway. Below the Lhakhang, there are two large rock Jachung(mystic bird) male & female. Another rock in the shape of pig considered to be Dorji Phamo. Just above the road there is bathing tub of Guru Rinpoche & Khandro Yeshe Tshogyal & worn rock below Chorten where tantric loving making had taken place. There is sacred cremation rock almost 100m east of Lhakhang in the side of Tang Chhu. The cremation is believed to very sacred as it was blessed by Guru Rinpoche. The death body of the people of Tang Gewog & other distance places are brought for cremation. 

 Rock cremation in TangChhu blessed by Guru Rinpoche about 100m above Lhakhang

Sources: Druk ge Ney- 1 , FB