Ischia lies in the Tyrrhenian Sea at the northern tip of the Bay of Naples, not far from the islands of Procida and Vivava and 17.5 miles from Naples. It is one to the Phlegrean islands. With 61,008 inhabitants it is the third most populated island in Italy after Sicily and Sardinia.
Roughly trapezoidal, its dimensions are about 10 km east to west and 7 km north to south, a coastline 34 km long and and a surface area of 46.3 km2
The highest peak is Mount Epomeo rising to 787 mt almost in the centre of the island, it is not a volcano but the result of the volcanic uplift of rockbeds in the past 30,000 years. The eruptions on the island were generally not too violent and with long intervals between episodes.
Following the ones during the Greek and the Roman times, the date of the last eruption is 1301 located on the east side of the island, when the river of lava (the Arso) reached the sea. Most of the shoreline of the island is part of the Marine Protected Area “Regno di Nettuno”.