The Caldeira of Graciosa Island is a volcanic formation with a diameter of about 1.6 km. It is located at the top of the smallest stratovolcano in the whole Azores archipelago.
Caldeira

The Caldeira of Graciosa Island is a volcanic formation with a diameter of about 1.6 km. It is located at the top of the smallest stratovolcano in the whole Azores archipelago.
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