No known volcanoes exist in Guinea-Bissau

Understand that Guinea-Bissau has no known volcanoes. The country is a low-lying coastal plain on old, stable crust. It sits away from plate boundaries and known mantle hotspots. Expect hills and mangrove coastlines, not volcanic cones.

Note why this creates an empty result. Volcanoes form where tectonic plates pull apart, collide, or where hot mantle plumes rise. Guinea-Bissau lies on the West African craton, a geologically quiet area. The land is mostly sedimentary and low relief. Geologic surveys and the Smithsonian Global Volcanism Program list no eruptions, volcanic fields, or volcanic peaks inside the country.

Check nearby volcanic regions instead. The closest volcanic activity is on island chains and the Cameroon Volcanic Line, well outside Guinea-Bissau. Examples: Pico do Fogo, Fogo (Cape Verde) — ~14.9°N, 24.3°W, active; Pico de São Tomé, São Tomé (São Tomé & Príncipe) — ~0.34°N, 6.72°E, volcanic origin (older activity); Pico Basile, Bioko (Equatorial Guinea) — ~3.6°N, 8.8°E; Mount Cameroon — ~4.2°N, 9.2°E, historically active. These sites are hundreds to a few thousand kilometers away. For authoritative details, consult the Smithsonian GVP and USGS. Explore those islands and the Cameroon Volcanic Line if you want real volcanic landscapes.