Markings on a tourist barque on the river to the Phong Nha caves, Viet NamKeywords:Vietnam, Viêt Nam, ベトナム, Đồng Hới, Dong Hoi, Phong Nha, cave, writing, boat, sign, blue (color) Back to the Phong Nha Cave | April 29, 2018 105 mm, 1/400s, f/2.8 AF 105mm f/2.8 D micro Location | |