Volcano Boarding is an absolute must in Nicaragua. There is nothing quite like the feeling of racing down an active volcano at speeds of up to 40 miles/hour. Now don’t freak out, those videos you see online are a little misleading. You only reach insane speeds if you actively try to, you have the ability to control your speed at all times.
CNN has put volcano boarding on Cerro Negro on their list of 50 Crazy things you must do before you die, and not only is this activity is on the list, but it is number two.