Central America’s youngest volcano, Cerro Negro. Exploding onto the scene in 1850, by 1968 it was 230 meters tall. After twenty three eruptions since birth it is now 675 meters in height -- all of it black lava rocks and black sand. Though a baby to its peers, the design of the volcano is peculiar. Seventy-five percent of the crater is ringed by and connected to a high perimeter wall, it being raised over time by recurring lava eruptions. I spent an hour and a half in strong winds walking the perimeter wall to peak, looking into the crater and the lava fields stretching south into the valley below. North of the perimeter wall are black sand dunes for two kilometers. It was on this face of the volcano that a French man rode a bicycle down, breaking the Guinness Book of World Records for fastest speed on a bike, clocked at 130.43 km/h.