Fly Like an Eagle - Assassin's Creed: The Ezio Collection - ACB

Jump with the Parachute off the top of Castel Sant'Angelo - 10

The Parachute can bought from Tailor Shops, once you have completed all of Leonardo's War Machine Missions. Then you need to climb to the top of the Castel Sant'Angelo, You need to climb to giant Flag Pole, where the Collectable Borgia Flag is. Jump off and then use the parachute by pressing X.

Castel Sant'Angelo