Home / Azores Geopark / Caldeira do vulcão das Furnas - Geosite, Caldeira das Furnas
Furnas volcano is a silicic polygenetic volcano with a summit caldera complex, the older with 8x5.6 km across. The geodiversity associated includes a volcanic lake (Lagoa das Furnas), domes and tuff rings, and a diversified hydrothermal system, with fumaroles, thermal and mineral waters. For this volcano are documented two historical eruptions, the last one in 1630 AD.