Sete Cidades ("Seven Cities") is one of the most beautiful natural settings in the Azores, composed of two lakes in the center of a volcanic crater about three miles across. Located on the west side of São Miguel Island, it is the most popular national park in the islands. The direction of the lake as of the photo runs from northeast to southwest and is 5 km in length and about 1 to 2 km in width. This volcano is one of the most active in the Azores in the last 5,000 years.

Looking from the edge of the crater to the lakes some 500 m (1,500 ft) below, one lake looks blue (reflecting the sky) and is called Lagoa Azul and the other appears green (reflecting the ground) and is named Lagoa Verde. According to a legend, the differently coloured lakes were created when a princess and her lover, a young shepherd, had to part from each other. The tears they shed at their farewell became the two lakes, with the water coloured like their eyes.