Rice fields at Phong Nha-Ke Bang

The karst formations surrounding Phong Nah-Ke Bang in Vietnam (see Phong Nha-Ke Bang) contain a fabulous assortment of caves and grottos, they house the longest underground river in the world, and the region was designated a UNESCO World Heritage Site in 2003. The unique geology is shown in the background. The foreground presents the most ubiquitous of all livelihood activities in Southeast Asia. All of the arable landscapes outside the park are skillfully farmed for rice every year. Life goes on.