Cayambe, which has a permanent snow cap, is a Holocenecompound volcano which last erupted in March 1786. At 4,690 m (15,387 ft) on its south slope is the highest point in the world crossed by the Equator and the only point on the Equator with snow cover. The volcano and most of its slopes are within the Cayambe Coca Ecological Reserve.
Cayambe was first climbed by British adventurer Edward Whymper and his two Italian guides and companions Juan Antonio and Luis Carrel in 1880, and it is a favourite of mountain climbers today.
The equator passes across part of Cayambe at an elevation of 4,690 metres (15,387 ft). This is the highest point along the equator.