Hellmouth, Geological formation in Ribeira Afonso, São Tomé and Príncipe.
The Hellmouth formation presents a natural gap in the volcanic rock face where water flows through a narrow channel into the ocean.
The formation received its name from Portuguese sailors in the 16th century who noticed the resemblance to medieval church carvings depicting monster mouths.
Local fishermen use the Hellmouth as a reference point for navigation and consider it a boundary between different fishing territories.
Visitors can access the formation via a marked trail from Ribeira Afonso village, with the best viewing conditions occurring during morning hours.
The rock formation creates specific sound patterns when waves hit the cavity, producing deep echoes that resonate across the surrounding area.
Location: Ribeira Afonso
Address: 6P7G+8HM, Ribeira Afonso, São Tomé and Príncipe Ribeira Afonso Ribeira Afonso
GPS coordinates: 0.21334,6.72642
Latest update: March 2, 2025 21:28
The island of São Tomé features ocean beaches, natural waterfalls, volcanic formations and tropical forests. The colonial heritage is visible through its old cocoa plantations, fort and cathedral. The area also includes landmarks marking the equator, coastal lagoons, and a national park with primary rainforest. Natural sites include Pico São Tomé reaching 2,024 meters and Pico Cão Grande, a volcanic needle 663 meters high.
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