Ubon Rachathani figures as the final or start of a loder Isarn tour. Sometimes called the Emerald Triangle, a reference ti its foresta and borders with laos and Cambodia, it is best known for its candle wax sculptures that are paraded throungh the city in late July. Ubon Rachathani airport, the high ways and. rail system also means it is now figured as a gateway to southern Laos, using either the ferry crossing on the Mekong River or the land route via Chong Mek to Pakes.