Misenum (modern-day Miseno) is a small commune near Naples, Italy. Today, Miseno is part of Bacoli. Miseno is at the end of the Gulf of Naples. The city has a long history. Originally, Misenum was part of Cumae. It was devastated by Hannibal, in the year 214 BC.
Today, it is mostly known for its beaches. The best-known sight is the Piscina Mirabilis, a water reservoir, of about 70m by 30m which the Romans constructed to support the fleet.