Only men can set foot on Mount Athos, and even for them it is a lengthy business to acquire a permit. Most people have to be content to enjoy a boat trip along the coast, to see the magnificent monasteries in their clifftop settings, against the backdrop of Mount Athos itself.
From a practical point of view, it is illegal for the boats to venture closer than 500m to the shore, so take a pair of binoculars if you have them, and a telephoto lens for your camera if you wish to get close-up photographs. Don’t leave behind your pocket camera if that is all that you have, as you may well get some wonderful photos of the dolphins which sometimes swim alongside the boats and leap spectacularly out of the water.