Cross the MA PHU PASS to discover the beautiful THUONG MOUNTAIN of Cao Bang Traveling to Cao Bang and conquering Ma Phuc Pass to explore the beautiful Thung Mountain is extremely interesting. If Ha Giang is very famous for Tham Ma Slope with winding curves used to test horse power, then Cao Bang has Ma Phuc Pass located in Quoc Toan commune, Quang Hoa district. This is a pass with beautiful scenery that is visited by many tourists. There are many legends about this Ma Phuc Pass, especially the story of the heroic man Nung Tri Cao who led the local people against the Song Dynasty in the North in the mid-11th century. Ancient legends say that on one occasion, Returning from the border patrol, to Quoc Toan commune, Tra Linh district today, encountering a winding pass, Nung Tri Cao's horse's legs buckled and could no longer walk. From then on, the mountain range was named An Lai and the kneeling horse pass was named Ma Phuc.