tourist man in the underground cave, stalactites and stalagmites. `oylat cave` bursa, turkey

ancient attraction beautiful bursa cave cavern caving colorful dark deep formation geologic geological geology inside interior karst landscape light limestone male man mineral mountain national natural nature nobody one oylat people rock scenic speleology stalactite stalactites stalagmite stalagmites stone tourism tourist traveln tunnel turkey turkeyn underground visit visitor walkways wall young