Sangay

Sangay (also known as Macas, Sanagay, or Sangai) is an active stratovolcano in central Ecuador. It is the most active volcano in Ecuador, having erupted three times in recorded history. It exhibits mostly strombolian activity; the most recent eruption, which started in 1934, is still ongoing. Geologically, Sangay marks the southern boundary of the Northern Volcanic Zone, and its position straddling two major pieces of crust accounts for its high level of activity. Sangay's approximately 500,000-year-old history is one of instability; two previous versions of the mountain were destroyed in massive flank collapses, evidence of which still litters its surroundings today.

Because of its remoteness, Sangay hosts a significant biological community with fauna such as mountain tapirs, giant otters, cocks-of-the-rock, and king vultures. Since 1983, its ecological community has been protected as part of the Sangay National Park. Although climbing the mountain is hampered by its remoteness, poor weather conditions, river flooding, and the danger of falling ejecta, the volcano is regularly surmounted, a feat first achieved by Robert T. Moore in 1929.