Arenal
This volcano is less than 10,000 years old, a child, but it has a volume of about 10km3, thus, small but rapidlly growing. The volcano has a pattern of long repose, hundreds of years, terminated by large silicic tephra eruptions, which are followed by eruptions of large lava fields. Lava fields are coalescing fans of dozens to hundreds of individual lava flows. This composite cone has mostly lava on the cone itself, but thick blankets of tephra surround the cone. The repeating pattern of repose, silicic blast, lava field may have repeated as many as 5 times. Complicating the pattern are large mafic tephras, whose place in the repeating pattern is not clear.
This is a beautiful, easily accessible place, but usually it is cloudy and rainy.