The bow shock-wave - very high subsonic flight, just below the speed of sound. Some surfaces of the aircraft are already supersonic - there is local supersonic flow. The mass condensation occurs in the low pressure area directly behind the bow shock-wave.
The Greek island of Santorini is a paradise for tourists and photographers and can be found in the Aegean Sea. It certainly is one of the most beautiful places in all of Greece, and a perfect holiday destination! Be amazed by these awesome pictures.