Perform a chimney jump of at least 4 wall kicks. This can be done several places throughout the game and you will complete this just by completing the story.
However, the best place to get this quickly is in the Mediterranean Sea level. Immediately after killing the Kraken, face the wall and move to your right. You should find a nook in which you can begin your wall kicks. By the time you reach the top you will have this achievement.
There will be a relic on this ledge AND you can get the first Swan Diver achievement by jumping off this ledge and into the water below. To swan dive jump (A) and press (B) immediately.
Enjoy your two achieves for the price of one.
***Perhaps 3 if you didn't have Climber as well***