northern Laos Rock formations in the Mekong River are covered with water during the rainy season. Concrete navigation aids are placed on top so boats can navigate around the rocks. In some cases, the boats hit the concrete navigation aids.

northern Laos A broken navigation aid above rocks in the Mekong River.

northern Laos As we cruised down the Mekong River deeper into Laos, the mountains became bigger and more rugged.