Capturing Borgia flags. What about Romulus Lairs?
In AC: Brotherhood, I already got all the flags in all of Rome's districts.
My DNA menu shows me that I still need to grab some flags from secret locations. It seems these locations are the secret Romulus Lairs.
Do I have to grab the flags when exploring the lair for the first time, or is it possible to return to the lair afterwards to grab the missing flags?
You can return later, but you don't do it by going back to the entrance on the map. Just open the menu, go to DNA, then to Secret Locations, and choose to re-play whichever ones you need.