Baixa do Espelho is a local arches in Ponta Delgada & Sao Miguel. It brings together reef dive with mixed rock and sandy bottom, starting shallow and dropping to mid-depths. a standout feature is a large volcanic hole with an arch that divers can swim through, offering a varied profile along the reef. marine life is described as diverse, with multiple reef fish and invertebrates commonly seen in the area. depth range supports a multi-level dive from shallow reef top to deeper sections, with a swim-through arch feature. Shore access keeps the logistics direct and simple. It suits divers who want scenic rock features and a tidy guided route.