The launch of a new GVP website is scheduled for Monday, May 20, 2013.
This compilation of synonyms and selected subsidiary features of Arenal may not be comprehensive. Subsidiary features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. A name that appears in brackets is preceded by its synonym. In some cases additional feature type, location, or elevation details are provided.
| Name | Type | Elevation | Latitude | Longitude |
| ARENAL | Stratovolcano | 1670 m | 10.463°N | 84.703°W |
| Lava domes | ||||
| Synonyms | ||||
| CANASTE | ||||
| COSTA RICA, VOLCAN | ||||
| GUATUSOS PEAK | ||||
| PAN DE AZUCAR | ||||
| RIO FRIO, VOLCAN | ||||
| Cones | ||||
| CHATO, CERRO | Stratovolcano | 1140 m | 10.445°N | 84.692°W |
| Domes | ||||
| CHATITO | Dome | 1100 m | 10.438°N | 84.687°W |
| ESPINA | Dome | |||