I just crossed the border from Seattle through I-5N and I didn't go through Canadian border or at least I didn't realize that maybe I did until I was already in Canada. I went through a border officer but I thought that he was American and asking me exit interview type questions and I thought that next will be the Canadian officer, I had no idea that it is only one checkpoint and after crossing it you are already in Canada. So now I am already in Canada but I didn't "land". So my question is if I could go to the Vancouver Int'l Airport and find an immigration counter to perform the landing procedure. I am only in Canada for a few days and going back to the states so I have to figure it out while I am here. Thanks for all the responses.