The Berlengas archipelago is a group of very small islands off the Portuguese coast near the city of Peniche. In the larger island (Berlenga Grande) there is an ancient fort and a lighthouse.

Nowadays, the archipelago has no permanent population. The fort is now partially converted into a resthouse. As the archipelago has been declared a reservation area due to the local fauna (sea birds, mostly), it is only visited by scientists and, in the summer, by a small number of tourists.

Berlenga Grande also starred in a pre-revolutionary Portuguese movie called "O Rei das Berlengas" (Portuguese for The King of the Berlengas), a comedy about someone who one fine day decides to become king of the said archipelago.

Source: http://www.crwflags.com/fotw/flags/fic-berl.html