Located at an altitude of 1,931m, Phja Oắc is likened to the "roof" of Cao Bằng with a cool climate year-round. On days when thick fog covers the area, it looks like a miniature European sky amidst the mountains and forests of the Northeast.

Standing on the mountaintop, it feels like you could just reach out and touch the clouds. If you love healing journeys, you must once hunt for clouds at Phja Oắc. In the early morning, a sea of white clouds gently embraces the mountains and forests, creating a breathtaking scene.