Volcanic Lava Cave Tourism Landscape
A cave that formed in lava can have high tourism value. After lava from a volcano cools and hardens, a series of complex lava caves and tunnels can form due to the escape of gas and shrinkage of the lava. These caves can be large and can become important cave tourism landscapes. An example is the Shishan Volcanic National Geological Park in Haikou, Hainan Province, which includes several large lava tunnels. The Wolong Cave is approximately 10 m wide, 7 m tall and approximately 3,000 m long, and its walls are composed of polished shiny basalt. The walls of the Fairy Cave are covered with thorn-like lava, in which the traces of magma flows can be observed; the largest chamber is approximately 14.7 m high and has an area of 5,800 m2.