Tengchong Volcanic Geopark is one of the four major volcanic groups in China, with 97 Cenozoic volcanic heaps. Its distribution is concentrated, its types are diverse and its preservation is complete. Its scale and integrity rank first in the country. It has high scientific research and ornamental value, and is known as "Volcanic Geology Museum". In the park, two volcanoes, Dakongshan and Xiaokongshan, can be seen. Looking for volcanic rocks near the crater carefully, we suggest to take a hot-air balloon, so that we can see the whole size of the empty mountains, or more shocking.