This one's within easy reach if you're coming down the road from where Flag 18 was; just look to the west, and you'll find it sitting on top of a building next to Acquedotto Claudia, and due north of the nearby Borgia/Assassin tower. (This is also near where you'll find the Acquedotto's Cluster, so keep a sharp eye out.)
Southwest of the Borgia/Assassin tower by Acquedotto Claudia, there's a large church; the next flag's on top of a tower adjacent to its north side.
Hunt around near the broken acqueduct at the northwestern edge of the dotted line on the map, and you'll see a set of ruined columns. The next flag is on top of this one:
Heading down to the southernmost "locked" area (surrounded by a dotted line), poke around near its northeastern border. You'll find the next flag sitting on top of a crumbling half-archway.
West of Flag 22's location, you'll find the Terme di Caracalla, which holds no fewer than three flags for the taking. The first one's on top of a column just southeast of the Terme's landmark icon.
You'll find the next one on a rooftop, just northwest of the Terme di Caracalla underground entrance.
Head southeast from Flag 24's location, and you'll find the next flag on top of a column near the Terme's back wall, which is pictured to the left below. To get to the flag's column, you'll need to climb up the archways to the right, then leap over.
Antico's last flag is tricky to get to, situated as it is on a seemingly unreachable hill just south of the dotted line near its western border. To get up there, you'll need to locate this broken bridge/acqueduct/whatever and head up the sloped path on its western side. Bring a horse, you'll need it.
Once you're up there, gallop across the broken bridge so that your horse jumps over the gap.
Once on the other side, hang a left and trot over to the ruins. The final Antico flag is on top of a couple of ruined pillars; hop across the nearby columns to reach it.
Antico Feathers 1-3
You'll find Antico's second-most accessible feather along the northwestern rim of the Colosseum, just south of the Viewpoint. (There's also a Cluster hiding on the outer wall just to the north of the feather, if you don't want to make a second trip later.)
Above: It's hard to see in this shot, but it's there
Just southeast of the Colosseum, you'll find another goddamn set of pillars by the side of the road. The next feather's on top of it.
This last feather's the trickiest to get. You'll find it on a pillar northeast of where the Romulus Treasure is hidden. Get started by climbing up to the archways at the center of this image:
Once you're up there, you'll need to leap over to the low column pictured below while holding down the B or Circle button to manually grab for it; trying to do an unassisted jump will result in a nasty fall. Once you've gotten a foothold, however, leaping to the next feather is cake. (Thanks to user ChrisAntista_isMyFather for pointing out that you don't need parachutes for this jump.)
Now that you've finally gathered all 10 feathers, you'll receive... a 20G Achievement or a Bronze Trophy. That's it; no new cape, no new weapon, not even a hug from Ezio's mom this time. Not even if you take them back and drop them in the chest at the Tiber Island Hideout.
To be fair, we did only collect 10 of the things, but given their significance in the last game, we were kind of hoping for something slightly more profound. Oh, well; enjoy the new addition to your Gamerscore and/or level!
Click the map for a larger version
Vaticano flags 1-5
This is the easiest flag to find; it's hiding in the moat behind Castel Sant'Angelo's eastern outer wall. From the bridge to the Vaticano district, just jump off and swim east until you're able to swim north. You'll find the flag on a mooring post, next to a convenient gondola.
Above: Now you can get back just a little bit more quickly
Once you've finally been granted access to Vatican City, you'll find the next feather on the roof of a church at the center of the district.
The next feather's just northwest of the last one, one a flat rooftop surrounded by a few clumps of hay.
You can find the second-to-last flag perched over the front gates of the Basilica di San Pietro. Just keep the camera trained upward as you approach, and you'll spot it.
This one will require doubling back to the Castel Sant'Angelo, but we saved it for last because it's the most rigorous (and consequently most awesome) one to get to. You can find the final flag at the very top of the massive flagpole on the Castel's roof.
The easiest way we've found to get up there is during the second mission at the Castel, which comes late in the game. As you travel through the place, you'll end up in this library, with an open window that leads to the Castel's west-facing wall.
Once you're out, start climbing - but instead of going for the checkpoint on your right, work your way up and to the left.
Before long, you'll be at Castel's roof; from there, all you need to do is climb the flagpole, which is pretty easy. (After you've reached the top, be sure to jump off and deploy your parachute for an easy Achievement/Trophy.)
Next page: The first nine Secret Location flags in Terme di Traiano: The Halls of Nero, Il Colosseo: Thrown to the Wolves and Catacombe di Roma: Wolves Among the Dead!
GamesRadar is the premiere source for everything that matters in the world of video games. Casual or core, console or handheld - whatever systems you own or whatever genres you love, GamesRadar is there to filter out what's worth your time and to help you get even more from your games. We deliver the best advice, the most in-depth features, expert reviews, and the essential guides for all the top games.