Udon Thani is located on the southern part of the Mekong. This prime geographical location has gifted the land with the rare characteristics of wetlands. The Han Gumphawapi Swamp or Bua Daeng Swamp (Red Lotus Swamp) in Udon Thani is a wetland of global significance and reputation. This rare type of wetland, found only in a few locations across the world, offers a unique ecosystem of biodiversity with ecological, economic, social, and political significance to all humans, plants, and animals. This rich biodiversity is deeply rooted in the people’s way of life, creating various communities of gardens, plantations, and horticul - tural markets that can serve as supply sources for Expo 2026.