Santorini, a famous island

A giant central lagoon is surrounded by high cliffs on three sides. On the fourth side, the lagoon is separated from the sea by another much smaller island called Thirassia. The lagoon merges with the sea in two places in the northwest and southwest. The water in the middle of the lagoon is about 400 meters depth, thus it is a safe haven for all kinds of shipping. All the ports of the island are on the side of the lagoon and there are ports on the outer perimeter of the island. The capital, Fira, is at the top of the cliff and is looking the lagoon.
In the island was one of the largest volcanic eruptions has ever seen the planet: the Minoan eruption (sometimes is called the Thera eruption), which occurred about 3600 years ago. The explosion left a large caldera, which is surrounded by volcanic ash and can be linked indirectly to the collapse of the Minoan civilization on Crete, 110 km to the south, from the creation of a giant tsunami. Another popular theory holds that the explosion of Thera is the source of the myth of Atlantis.
Santorini was united with Greece in 1912. The major settlements therein are: Fira, Oia, Emporio, Kamari, Perissa, Imerovigli, Pyrgos and Thirassia. Akrotiri is an important archaeological site with ruins from the Minoan era. The island relies on tourism, especially during the summer months. In order Caldera to continue its being, the island's pumice quarries closed in 1986.