Unlike the nearby Ischia and Procida, the island of Capri is of karstic origin, initially joined to Sorrento and then later be partly submerged by the sea and then separated from the mainland, where today is the close of Bocca Piccola.
Capri has a complex morphological structure, with peaks of medium height (Monte Solaro 589 meters and  Monte Tiberio 334 meters) and vast interior highlands, including the main one is that of "Anacapri".

The coastline is very rugged with steep cliffs and numerous caves that were used in Roman times as nymphs of private villas built in that period. Today, the world's most famous is undoubtedly the Blue Grotto, where magical light effects were described by many writers and poets.

Characteristic of Capri are the famous Faraglioni, three small rocky islets a short distance from the shore, creating a spectacular visual effect and landscape.

In Capri there are no sources of drinking water but is full of many animal and plant species, some rare, like blue lizard, which lives on the Faraglioni. The vegetation is typically Mediterranean, with a prevalence of agaves and  india figs.
The main towns on the island are Capri, Anacapri, Marina Grande and on the other side of Capri, Marina Piccola, is less populated.