[Caserma Di Alviano]
This can be found on the outer walls that surround the barracks. Climb up to
the shingled roof. You will find the Glyph on the outside of the eastern
wall. Drop over the side and grab it as you fall (with Eagle Vision on).
Now, from this area, go south by southeast. More than likely, you'll see the
white wall preventing you from going any further. Hug the wall and go south.
Eventually you'll find a way to get to your mission marker. To save yourself the
hassle though, you can also use quick travel. As it turns out, your destination
is near one of the tunnels you already opened from earlier in the game. Go to a
tunnel entrance and go to Porta Nomentana and there you go! (thanks to
CPL_Dexter for this).
This area is all uncharted, so getting that view point to the south would be
nice. Unfortunately though, you can't reach it until you can fix the Aqueduct,
which of course, is not possible until you take the Borgia Tower. The Tower of
course, is blocked off. Great.
Eerst de Borgia Tower vernietigen, daarna kun je het aquaduct maken. Heb je deze al?