Tinguiririca Volcano is a massive and active stratovolcano

Stratovolcano

A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 located in Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

's 6th or O'Higgins Region

O'Higgins Region

The VI O'Higgins Region is one of Chile's 15 first order administrative divisions. It is subdivided into three provinces. It is named in honour of Bernardo O'Higgins Riquelme, one of Chile's founding fathers....

 and near the Argentinian border. Constant fumarolic activity occurs within and on the NW wall of its summit crater and hot springs and fumaroles can also be seen on the western flanks, as illustrated by the image on the right.
It was near this volcano that the Uruguayan Air Force Flight 571

Uruguayan Air Force Flight 571

Uruguayan Air Force Flight 571, also known as the Andes flight disaster, and in South America as Miracle in the Andes was a chartered flight carrying 45 people, including a rugby team, their friends, family and associates that crashed in the Andes on October 13, 1972...

crashed in 1972 with its survivors lost for seventy-two days.