beautiful illuminated multicolored stalactites in danzhou stone flower caves, geopark next to haikou, hainan, china

asia attraction background beautiful beauty blue cave cavern caverns china color colorful cover danzhou deep flower foreground furong geologic geological geology geopark guiling haikou hainan hanging horizontal illuminated inside karst lake landforms landscape light limestone natural nature park pink place rock spike stalactite stalagmite stone texture tourism travel underground view