Lagoa das Sete Cidades and the twin colours of a volcanic lake
Published on 09/17/2026 at 10:15 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Lagoa das Sete Cidades is a twin lake filling a wide volcanic caldera on the western side of São Miguel island, west of Ponta Delgada in Portugal. Set within the Sete Cidades Massif, the lake is divided into two bodies of water known as Lagoa Azul and Lagoa Verde, whose different colours are one of the defining sights of the Azores.twin lake in a volcanic crater
A caldera landscape shaped by water and rock
The lake occupies the floor of the Caldeira das Sete Cidades, a collapse caldera created by major volcanic activity in the western part of São Miguel. The Sete Cidades volcano forms a broad massif at the island’s western extremity, where centuries of eruptions built lava domes, cones and tuff rings before the summit area subsided into a basin.Sete Cidades polygenetic volcano Inside this basin, Lagoa Azul and Lagoa Verde dominate the view, bordered by steep crater walls and scattered pumice cones.
Lagoa das Sete Cidades is the largest lake in the Azores by surface area, extending for several kilometres along the caldera floor.largest lake in the Azores The combined lake covers a little over 4 km² and reaches a maximum depth of around 33 m, holding a substantial body of freshwater in a relatively compact basin.area and depth of the lake The surrounding slopes rise sharply from the water, and the caldera rim forms a high encircling skyline that helps visitors understand the scale of the volcanic structure.
Blue and green: the two faces of the lake
Although Lagoa das Sete Cidades is a single lake, it is experienced as two distinct basins separated by a narrow land bridge and strait, crossed by a low road bridge that links the village of Sete Cidades to the rest of São Miguel.two basins joined by a strait On one side lies Lagoa Azul, whose water tends to appear blue; on the other lies Lagoa Verde, where the colour leans towards green. The contrast between these adjoining expanses of water is immediately visible from many vantage points on the rim.
The colours are strengthened by the vegetation and relief around each basin. Forested slopes, pasture and scattered houses reflect differently on each surface, and the angle of the light further distinguishes the two bodies of water.Lagoa Azul and Lagoa Verde Looking down from the higher viewpoints, visitors see the bridge, the narrow strait and the village of Sete Cidades set between the lakes, reinforcing the impression of a landscape divided into blue and green halves.
Protected status and viewpoints around the rim
Lagoa das Sete Cidades and its surroundings form a protected area at the western end of São Miguel, recognised for both geological interest and ecological value.protected area at the west end The lake is classified as a protected body of water under regional management plans, and the wider area participates in initiatives such as the Azores UNESCO Global Geopark and the Ramsar list of important wetlands.Ramsar wetland and geopark
One of the most visited viewpoints is Miradouro da Vista do Rei on the southern rim, at an elevation of around 656 m above sea level.Miradouro da Vista do Rei From this vantage point, the entire arrangement of the caldera becomes clear: the twin lakes, the belt of farmland and houses in the basin, and the surrounding volcanic massif stretching towards the ocean. Other viewpoints on the rim offer variations on this panorama, with paths and minor roads tracing sections of the caldera edge.
Visiting Lagoa das Sete Cidades: what travellers from Western Europe should know
- Lagoa das Sete Cidades lies in the municipality of Ponta Delgada on the western part of São Miguel; roads from Ponta Delgada cross the island to reach the caldera rim and descend towards the village of Sete Cidades.
Public transport on São Miguel is limited, so many visitors rely on hire cars or organised excursions that combine several viewpoints around the lake. - The terrain inside the caldera includes gently undulating lakeside roads as well as steeper paths rising towards the rim, with sections of compacted earth and occasional stone steps where routes gain height quickly.
On the rim, viewpoints can sit several hundred metres above the lake surface, and the drop from the edge to the basin is significant. - Lagoa das Sete Cidades is on São Miguel island in Portugal, where the official language is Portuguese and the currency is the euro (EUR).
English is spoken to varying degrees in services linked to tourism, but signage and local information frequently appear in Portuguese.
Searching for Lagoa das Sete Cidades on social platforms
These links open searches for Lagoa das Sete Cidades on each platform.Frequently asked questions about Lagoa das Sete Cidades
Where is Lagoa das Sete Cidades located?
Lagoa das Sete Cidades lies within the municipality of Ponta Delgada on the island of São Miguel, in the Azores archipelago of Portugal. It occupies the floor of the Sete Cidades caldera at the western end of the island.
What can visitors expect when they reach the lake?
Visitors encounter two contrasting basins, Lagoa Azul and Lagoa Verde, joined by a narrow strait and overlooked by high crater walls, with the village of Sete Cidades and areas of pasture and woodland spread across the basin floor.
What makes Lagoa das Sete Cidades distinctive among lakes?
The combination of a large freshwater lake divided into blue and green basins, its setting inside a well-defined volcanic caldera and its protected status within regional conservation programmes gives Lagoa das Sete Cidades a character closely tied to both geology and landscape.
