The Amalfi Coast is a featured destination on many travel itineraries. It is the mountainous southern shore of the peninsula which includes Sorrento on its north side. Like most of this peninsula, the mountains extend to the waterline, and finding habitable space for housing is a precarious proposition. The highways are treacherous appearing as they skirt the mountain edges, and often require stretches which hang over mid-air. Tourist buses occasionally have to back up once to make it around the hairpin curves on the main highway. Rather than having neighbors on four sides, along the Amalfi Coast there are neighbors right, left, above, and below. Positano is built within one of the many narrow valleys between the mountains.