When you start a game on Erosion (free DLC available to the public) and if you're playing CTF go to the base A and follow these directions.

First you're going to want to face straight forward and go through the door/hole then you should see a church type place. Go in there.

There should be a door on your left and one in front of you. Go to the one in front of you. You should now be at where the base C would be in capture the flag.

Keep going until you are close to a wall in front of C, then turn left.

Now if you look somewhat to your left you should see a bunch of bushes.

Turn back the way you were facing and go straight until you get to another door.

If you turn around and look at the bushes again you should see a ledge bordering the bushes.

Run over and jump on that ledge. You will not be able to go in the bushes but you will be able to see a good half of the map if you look at the bushes and turn around.

Also if you hide in the grass around the bushes it will give you good camoulague and make you hard to see.