OK, how high is Mt. Lascar?
BTW, you are all mistaken. The face you see is the Chilean Chicken of Chickaboombah.
It's a flying rat. AKA pigeon.
5592 meters; 18,346 feet.
Guallatiri is higher (19,918 feet), and still has hydrothermal activity at the summit, and last erupted in 1960. So "highest active volcano" will depend on how "active" is defined, obviously.