Aerial view of Bac Son Valley, Lạng Sơn, Vietnam
Sharp rock formations in Tsingy de Bemaraha National Park, West Madagascar
Karst pillars in Zhangjiajie National Forest Park, Hunan, China
Landscape with Li River and karst mountains, near Xingping, Yangshuo, Guilin, Guangxi, China
Karst formations reflected in Yulong River, Yangshuo, China
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