Santorini, officially known as Thira is the jewel of the Greek Islands. Formed from the remains of a giant volcanic caldera, the island is believed by some to be the site of Atlantis. This legendary city is thought to have vanished into the sea around 1500 BC following a catastrophic eruption, which also wiped out the Minoan culture on the island of Kriti (Crete). Today, the capital of Santorini, Fira, perches romantically on the edge of the caldera, overlooking a lagoon where a new volcano, Nea Kameni emerged in AD 47. Its last minor eruption occurred in 1950.