The Grotta del Genovese can only be visited on a guided tour with the official custodian, Natale Castiglione, who generally takes small parties to the cave once or twice a day, at 10.30am and also 3pm in July and August. If you want to visit the cave you should book in advance, though this is usually possible at fairly short notice - our hotel in Favignana telephoned and booked for us a couple of hours beforehand. There are three options for visiting the cave. You can walk there yourself, and meet the custodian at the cave - book ahead and check this option is possible - you can travel overland by jeep (fuoristrada) then descend to the cave on foot, or - when the sea is calm enough to land - you can take a boat trip. The walk downhill from the jeep to the cave takes up to twenty minutes down a footpath which zig-zags down the slope. The walk up is more tiring and visiting the cave on foot isn't really to be recommended for anyone infirm. Wear tough shoes, and take water to drink. The custodian's little office on Levanzo is on the lane just above the port (take a right, then a left, or ask a local).