15. Arenal volcano
At one time Arenal volcano was regarded as an active volcano but since 2010 it has maintained a relatively low profile putting an end to the frequent eruptions. Still it is a favored tourist spot among tourists partly because of the luxuries offered by the numerous hot springs in the area and also the innumerable waterfalls, lakes, rivers that add to the scenic beauty of the place.
Image Credit: stormchaser
Volcanoes represent that part of nature which has still not been tamed by man. Volcanoes being a strong force to reckon with, one simply hopes they stay pretty and stunning without turning violent.