The White Island
Classified by UNESCO as a Biosphere Reserve, the island of Graciosa is the second smallest of the archipelago and is also the one with the least imposing terrain, with several flat areas and smooth hills. Pedras Brancas (White Stones), Serra Branca (White Hills) or Barro Branco (White Clay) are localities on the island whose name is related to the presence of a volcanic rock, the trachyte, which is common on the island and which, once rotten by the passing of time, gets a whitish colour which justifies the nickname of White Island.