Natural Scene Scene 3D model Naturally formed Scene 3D scanning Mauritania Underground River Underground river cave cave Mysterious and unique geological landscape Primitive style and natural beauty

Natural Scene Scene 3D model Naturally formed Scene 3D scanning Natural wonders Mauritania Underground River groundwater Create an oasis Geological landscape

stone Crushed stone Gravel pile Shidui stone Crushed stones Natural gravel Naturally formed Luanshi Gang Xiaoshidui