PR 27 - Glaciar de Planalto

This 4.5-mile loop trail starting at Bica da Cana on Paul da Serra plateau showcases remarkable geomorphological evidence of Pleistocene glaciation around 25,000 years ago. The 2-hour 17-minute moderate hike climbs an eroded ancient basaltic cinder cone (Fonte do Juncal) formed by Middle Pleistocene volcanic activity (1.8 million-774,000 years ago), revealing subglacial erosion basins during the approach. The descent passes Miradouro das Rabaças viewpoint overlooking Ribeira Ponta do Sol valley headwaters and moraine deposits of massive basalt blocks. The trail culminates at Fajã Redondo glacial cirque at Sítio das Pedras—an exceptional geological site—containing ruins of traditional shearing corrals, creating a unique geological and cultural hiking experience.