Black old pot, like an underground ice palace, natural ice library, loess hail, is a rare landform wonder on the loess plateau. It is located in the underground ice cave wonder of Xifeng District, Qingyang City, Gansu Province. The grotesque stones on both sides of the canyon, the rock wall is steep, the ditch in the cave is longitudinal and horizontal, the stream is flowing, the rock seam is like a bead, the wonder is ringed, the rock on the top of the cave is covered by the sky, and the shape of the cave is similar to the iron pot of cooking, so the locals call it "black old pot"