Caldas, Colombia
5.206 N, 75.364 W
summit elevation 3858 m
complex volcano
Romeral is the northernmost volcano in South America.
It is located 16 km SE of Aranzazu, a town of 9000 people.
Romeral has only recently been identified as a volcano.
Further reading
Vargas, Carlos A., Paul Mann, and Carlos Borrero. "Field guides for excursions to the Nevado del Ruiz Volcano and to the Romeral Fault System (Colombia), in the frame of the Neotectonics of arc-continent collision concepts." Earth Sciences Research Journal 15.1 (2011): 47-74.
Plinian eruptions are dated from 8000 years ago.