The major towns, neighborhoods, streets, and landmarks of Capri
Most people arrive on Capri at Marina Grande, the busy, touristy main port. A bus or funicular from here takes you up to Capri, the main town—which, to avoid confusion, I'll refer to as "Capri Town"—and home to most of the boutique shopping, posh hotels, chichi nightlife, and Beautiful People (Tom Cruise, Nicole Kidman, and Julia Roberts all visited just while I was on the island researching this—not kidding).
The center of Capri Town is Piazza Umberto I, called by everyone the Piazzetta.
Out the other side of Capri Town is Marina Piccola, a smaller yachting port consisting of several restaurant/beach establishments.
Capri and the ports occupy the narrowest part of the island, from which a mountain rises in either direction. Halfway up the larger of these, Monte Solaro, sits the village of Anacapri, Capri town's historic rival but today the cooler, calmer, cheaper, and slightly less crowded and developed of the two towns—if any of village life survives on this touristy island, it's in Anacapri.
The free map they all hand out is fine for most visits, but if you plan on a lot of hiking and exploring, you'll want to buy the more detailed map; it's worth the investment.