For nature lovers, climbing Stromboli is one of Sicily's not-to-be-missed experiences. Since 2005 access has been strictly regulated: you can walk freely to 400m, but need a guide to continue any higher. Organised treks depart daily (between 3.30pm and 6pm, depending on the season), timed to reach the summit (924m) at sunset and to allow 45 minutes to observe the crater's fireworks.
The climb itself takes 2½ to three hours, while the descent back to Piazza San Vincenzo is shorter (1½ to two hours). All told, it's a demanding five- to six-hour trek up to the top and back; you'll need to have proper walking shoes, a backpack that allows free movement of both arms, clothing for cold and wet weather, a change of T-shirt, a handkerchief to protect against dust (wear glasses not contact lenses), a torch/flashlight, 1L to 2L of water and some food. If you haven't got any of these, Totem Trekking hires out all the necessary equipment, including boots (€6), backpacks (€5), hiking poles (€4), torches (€3) and windbreakers (€5).