Quan Ba ​​is a gateway district located to the southwest of Dong Van Stone Plateau Global Geopark, Ha Giang province. 46km north of Ha Giang city, crossing the steep Bac Sum slope in the clouds, visitors have come to Quan Ba ​​heaven gate. Standing from here, you can admire the cool and poetic Tam Son town all year round, which is likened to "Da Lat" of Ha Giang, especially to admire the round and charming Quan Ba ​​Twin Mountains that look like breasts. roundness of a sleeping fairy. I don't know when, the people here called this unique pair of mountains the Twin Mountain. At the foot of the Twin Mountain is the rice field of Quan Ba ​​Twin Mountain. During the four seasons, the landscape here changes color just like that of Co Tien changing her clothes: blue shirt - that's when the rice fields are entering the girl's time; When the rice season is ripe, they put on a splendid royal robe; in the plowing season is a brown suit to shake hands on the new rice season and so on, but the nipples are always full of life. The landscape of the Doi Nui area always attracts tourists from near and far.