Wetlands are areas of land where the soil is saturated with water for a significant period of time. They can be found in a variety of locations, including near rivers and lakes, along coastlines, and in low-lying areas. Wetlands have many important functions, including: Water storage and filtration, reducing flooding, biodiversity support, store large amounts of carbon, which helps to mitigate the effects of climate change. Wetlands provide opportunities for activities recreation and significant culture for many communities. Overall, wetlands are an important natural resource with many ecological, economic, and cultural benefits. Protecting and preserving these valuable ecosystems is essential for maintaining a healthy planet. This paper will focus on analyzing the value of wetlands in two countries, Vietnam and Sri-Lanka.