The Blue Grotto is known all over the world for its vastity and the deep blue color that the water takes. It is possible to visit it starting from Marina Grande with the motorboat, which tours around the island of Capri and stop at the entrance of the grotto. To get in, you must sail on small rowboats capable of two/three passengers maximum and once the passengers lay on the floor, the boat passes the entrance. Of course, the procedure cannot be done in days of wind like Mistral or Libeccio.
The entrance is a small cave on the rocky walls of the Grotto, elevated about one meter up from the sea level. That's why people have to lay on the boat to enter. The guide leaves the rows and brings the boat inside the grotto thanks to a chain held in the rocks. Inside everything gets a blue colour; this is due to the fact that there is a submarine window just beyond the entrance, absorbing reddish colors and letting the blue pass.
There is a second phenomenon, that is the fact that any object submerged in the grotto assumes a silver color. This is due to the fact that the bubbles of air adhering to objects let the light come out, having a different refraction of light index. The grotto continues in the Galleria dei Pilastri and continues in the Sala dei Nomi, so called because of the firms written by the visitors. The accessible grotto ends in the Sala della Corrosione.
Capri’s three world famous Faraglioni rise up, majestic and solitary, from the sea to the south-east of the island. The largest rock, connected to the coast by a thin isthmus of land, is known as “Stella” (star) and is 109 meters high, while the other two, “Faraglione di mezzo” (middle stack) and “Scopolo” (rock), are 81 and 104 meters high respectively. The only inhabitants of the Faraglioni are a colony of blue lizards, an extremely rare variety of blue reptiles.