Go to the indicated location, and use eagle vision to find the symbols to solve the listed puzzle for the corresponding Nostradamus Enigma. Each symbol has a riddle which once solved, leads to another symbol. All symbols are located in the same area, and are usually in the same district where the mission begins. Synchronize all View Points in the area to make the process easier. After all symbols of a puzzle are found, you will get a fragment that can be used in a secret room of the Café Theater in the mansion's basement. There are a total of 18 Nostradamus Enigmas.