| Tam Giao (i.e. Three traditional religions, including | | | | was engraved. This arrangement was affected by |
| Taoism, Buddhism and Confucianism) Temple, also | | | | the thought of Confucianism "the green dragon on |
| known as Tam Giao Pagoda together with Nhi Thanh | | | | the left and the white tiger on the right", which is |
| Grotto is one of the eight beauty spots in Lang Son. | | | | correlative to the constellations at the east and west. |
| According to the documents left, this temple was | | | | At the opposite of the grotto, Ngo Thi Si let people |
| established by Ngo Thi Si - the commander | | | | carve his statue onto the stone; this statue later is |
| administering Lang Son in order to worship all three | | | | highly evaluated as one of the works containing |
| special ones: Khong Tu (Confucius) of Taoism, Phat | | | | precious value in fine arts at that time. In side this |
| Thich Ca (Sakyamuni) of Buddhism, and Lao Tu | | | | relic area, there are 20 epitaphs that have been |
| (Lao-tzu) of Confucianism. | | | | carved directly on the stone left; those epitaphs |
| In May 1779, Ngo Thi Si hired masons to embellish | | | | recorded many valuable materials and were also the |
| the grotto area. The left grotto is high and has | | | | autograph books of the contemporary famous |
| better ground position; hence, Tam Giao Temple was | | | | scholars. |
| built on this ground. The grotto Nhi Thanh under the | | | | Annually, on the 15th to 17th days of the first Lunar |
| pagoda is a natural rocky cave with the length of | | | | month, the residents living around this region are |
| more than 500 meters from the front gate to the | | | | eager to go on a pilgrimage to this temple to |
| back gate and a great deal of spectacular natural | | | | commemorate Ngo Thi Si, a cultural famous person |
| scenery. To the left of the grotto, a dragon was | | | | who had merits in establishing and developing Lang |
| carved; above to right side of the grotto, a tiger | | | | Son Township. |