Hahah you guys are making me blush.
I used a X pro 121S filter (which I thought ment strong as it had an ND8 but it means soft) and then desaturated the photo a little bit in photoshop.
Also the lens used was a 10-22.
http://www.cokin.com/filtres2.html?=#139
I want to get a 121F and a 124