São Jorge is one of nine islands that execute up the Azores archipelago. The long,narrow landmass measures just 53 kilometers (33 miles) long and 8 kilometers (5 miles) wide. A high plateau runs along the center of São Jorge, marked by a row of volcanic peaks. At the foot of the steep cliffs lie a number of fajãs, and flat extensions of land close to sea level that stretch out from the island.
Although all of the Azorean islands have fajãs,São Jorge has the highest concentration by far—and arguably some of the most beautiful. The fajãs consist of small areas of flat terrain surrounded by cliffs. Many of them were created by ancient lava flows hundreds of thousands of years ago. There are 46 fajãs on São Jorge, approximately two thirds of which are located on the north coast. They have fertile soil, or have historically been used for growing fruits,vegetables, wheat, or other crops. Thanks to microclimates,some of the fajãs can support tropical species such as coffee and bananas. Specimens of the rare dragon tree can also be seen on occasion.
Each of these areas offers something unique: Fajã da Caldeira do Santo Cristo is a protected nature reserve with an underground cave, and it is also well-known for being domestic to a particularly tasty type of clam. The Fajã dos Cubres is known for a crystal clear lagoon. Fajã do Ouvidor is the most populated, and with approximately 30 resident families.
Most of the fajãs are inhabited,but getting down there might be a cramped tricky because the roads are very treacherous and zig-zaggy. Some of the fajãs are only accessible by sea. Some also have lagoons, including the best-known: Fajã dos Cubres and Fajã da Caldeira. At night you can clearly hear the strange calls of the Corry's Shearwater, or that can final until midnight.
Source: atlasobscura.com