The Pontine Islands are a group of volcanic islands located in the Tyrrhenian Sea, off the western coast of Italy. They are part of the Lazio region and consist of six main islands: Ponza, Ventotene, Palmarola, Zannone, Gavi, and Cirrceo. The islands are known for their stunning natural beauty, crystal-clear waters, and rich marine life, making them popular destinations for tourists. Historically, the Pontine Islands have been inhabited since ancient times, with evidence of settlements dating back to the Romans. Today, they are known for their charming villages, beautiful beaches, and opportunities for outdoor activities such as hiking and diving. The islands are accessible by ferry from the mainland, particularly from the city of Formia.