The gulf of Naples is great for diving enthusiasts, and the città sommersa of Baia is as good as it gets. A half-day excursion (8.30am-1pm) with one dive costs €30, and a full day (8.30am-5pm) with two dives and lunch on board is €60. Equipment can also be rented at €15. Dives can also be arranged along the Neapolitan coast or on the islands, and courses are run at all levels via PADI-accredited instructors. Friendly, careful tuition is also available in English.