The Serra Devassa trail (PRC05 SMI) in São Miguel, Azores, is a must-do hike that takes you through stunning volcanic landscapes, including lagoons and peaks. The official 4.9 km circular route offers breathtaking views, with an optional 2 km extension to the Grota do Inferno viewpoint for an even more unforgettable experience. Well-marked and accessible, this trail is perfect for hikers looking to explore the unique beauty of the Azores.