This first picture is looking down - In the sea, the shape on the left is 3 islands, called "Li Galli Islands", named Gallo Lungo, Rotomda and Castelletto. These islands are where Greek mythology would have you believe the three sirens tempted Ulysses on his way back home. The mass on the right is actually a large rock protruding from the sea known as "Whale Rock".
In this second picture, looking up, we were in the town directly above Positano. Montepertuso, which literally means "hole in the mountain". There is no official name for it, however legend says God was angry and put his fist through the mountain.