Reventador, Active stratovolcano in the eastern Andes, Ecuador.

Reventador is an active stratovolcano in the Cordillera Real of Ecuador's eastern Andes, set in a remote area of the national park that bears its name. Its summit cone rises about 1,300 m from inside a 4 km-wide caldera whose eastern wall is broken by a collapse. The upper slopes are bare grey-brown rock, the lower flanks green with vegetation, and a lower secondary peak stands to the right of the main summit.

The first documented eruption occurred in 1541, marking the start of ongoing volcanic activity. Since then, the volcano has cycled through periods of rest and intense eruptive phases.

The name Reventador means "exploder" in Spanish, a reference to the volcano's repeated outbursts. The mountain gives its name to the surrounding national park, which protects a remote stretch of the western Amazon basin. The Quichua name T'uqyaq urqu also refers to the volcano's eruptive behaviour.

Monitoring stations continuously track volcanic activity and help authorities issue safety warnings. Visitors should always check current conditions before traveling to the area.

The crater frequently ejects ash plumes reaching up to two kilometers high, often darkening the valley below. At night, the crater glows orange, revealing the intense heat within.