Answer: Taiwan
Notes: Recently, the Wandan mud volcano in Taiwan erupted, sending bubbling mud into the air while locals set the escaping gases on fire with burning rags. A mud volcano is a small cone of mud and clay, usually less than a few meters high. It forms from hot water mixed with fine sediment, which either flows gently like lava or bursts out like a fountain due to volcanic gas and boiling water. The craters are shallow and erupt mud on and off, rebuilding cones that erode easily. Mud volcanoes, also called mud domes or sedimentary volcanoes, release gases like methane, carbon dioxide, and nitrogen along with often salty or acidic water.
