In the easternmost part of the Golfo degli Angeli (Gulf of Angels), a rocky promontory covered with dense Mediterranean greenery extends towards the sea: on its right lies an immense expanse of golden sand, while on the left there are a series of coves with very white sand nestled in the cliff. Overlooking the promontory, called Capo Boi, 120 metres above sea level, stands an ancient watchtower, which has dominated this spectacular panorama for almost five centuries. The cape represents the western limit of the marine protected area of Capo Carbonara, as well as the coastal border between Campidano and Sarrabus, and it falls within the coastal enclave of the Municipality of Sinnai.