The Mekong River is a trans-boundary river located in Southeast Asia. It is one of the longest rivers in the world, 12th to be exact, and the 7th longest in Asia. Due to the fact that it crosses many borders, there are tons of fun activities to do! To start, nothing gives you the lay of the land better than a river tour. A personal favourite place to start is in Ho Chi Minh City, Vietnam. As it is a trans-boundary river, these tours give you a wonderful sense of the continent’s topography as well as a deep understanding of its culture.