I took the ferry from Calais to Dover when I returned to England to catch my flight in 2006. I had several hours to walk around the city before the ferry left and had the chance to take some nice photos and a great tour of the Calais War Museum which can be found in the France:Calais page.
Here are some photos from the Ferry ride across the English Channel. The last photo is almost embarrassing as I really do need to learn to smile for photos. It was quite chilly that afternoon and the wind was blowing but that really isn't an excuse as I have never been able to smile for photos.