Astola Island, also known as Jezira Haft Talar Satadip or 'Island of the Seven Hills', is a small uninhabited Pakistani island in the Arabian Sea approximately 25 km (16 mi) south of the nearest part of the coast and 39 km (24 mi) southeast of the fishing
port of Pasni. Astola is Pakistan's largest offshore island at approximately 6.7 km (4.2 mi) long with a maximum width of 2.3 km (1.4 mi) and an area of approximately 6.7 km2 (2.6 sq mi). The highest point is 246 ft (75 m) above sea level. Administratively, the island is part of the Pasni subdistrict of Gwadar District in Balochistan province. The island can be accessed by motorized boats from Pasni, with a journey time of about 5 hours to reach the island.
The earliest mention of Astola is in Arrian's account of Admiral Nearchos, who was dispatched by Alexander the Great to explore the coast of the Arabian Sea and the Persian Gulf in 325 BCE. The sailors in Nearchos's fleet were "frightened at the weird tales told about an uninhabited island, which Arrian calls Nosala".
The island consists of a large tilted plateau and a series of seven small hillocks (hence the local name "Haft Talar" or "Seven Hills"), with deep chasms and crevices, which are several feet wide. There are several natural caves and coves on the island. The south face of the island slopes off gradually whereas the north face is cliff-like with a sharp vertical drop.
In 1982, the Government of Pakistan installed a lighthouse on the island for the safety of passing vessels, which was replaced by a solar-powered one in 1987.
Between September and May of each year, Astola becomes a temporary base for mainland fishermen for catching lobsters and oysters. From June to August, the island remains uninhabited due to the fishing off-season, the rough seas and high tides.
There is a small mosque dedicated to the Muslim saint, Pir Khawaja Khizr, which is used by the mainland fishermen during the fishing season. Ruins of an ancient Hindu temple of the Hindu goddess, Kali are located on the island. The island was also known to the Hindus as Satadip.
In Arrian's Indica, which describes the westward journey of Alexander's fleet after the Indus Valley campaign (325 BC), Admiral Nearchus is quoted as having anchored by an island named 'Carnine'. It was said to be inhabited by the Ichthyophagoi ('fish eaters' in Greek) and where, "even mutton had a fishy taste". The Persian phrase mahi khoran (fish eaters) has become the modern name of the coastal region of Makran. Some scholars have assumed Carnine to be Astola, without considering the extreme aridity and lack of fresh water, which renders the place inhospitable for human habitation, as well as animal husbandry. In all likelihood, Carnine was the name of an island in the inland sea, presently known as Khor Kalmat. This latter conjecture supports Nearchus' coast-hugging voyage (which would have kept him well away from Astola), a compulsion meant to provision Alexander's army that was supposed to have marched along a coastal route.
Astola island is a popular but "hard" destination for eco-tourism, although there are no lodging facilities on the island. Overnight tourists must camp on the island and bring their own provisions. Camping, fishing and scuba-diving expeditions are popular. It is also a site for observing turtle breeding. There has been some damage to Astola's ecology due to rats and domesticated cats left behind by fishermen, which have threatened bird nesting sites and turtle hatcheries.