Son Dong Cave, Vietnam
Located in the Vietnamese province of Quang Binh, Son Dong Cave is considered the largest in the world. To see the cave, head to Fong Nya Kebang National Park. Here you can see passages up to 200 meters high and 150 meters wide, and travelers are delighted with the underground river, as well as the plants under the holes in the vaults of the cave, which cause sunlight to break through.
О Пещера Шондонг, Вьетнам, у нас тоже была такая задача, я сделала это:)