Do you know what snowboarding is? Well, volcano boarding is just like that… except that you slide down the side of a volcano. Really! This is an extreme sport that began in Nicaragua fairly recently (2005). It is considered extreme due to the 40% gradient of the volcano–you are going straight down–but also because of the poisonous gases and the fact that the ash can cut your skin (you usually wear an orange suit to protect yourself). Check out the video below to see what it is like–and let me know if you find any VR apps to simulate the experience. This video at 0:25 is also awesome, but the background music is a little weird (FYI). Note that Cerro Negro is the only active volcano in the world where you can do this. Eeek!