For scenes on the west coast, there are some beautiful places in British Columbia that would work. I don't have any pictures, but there are a lot of old-style fishing towns dotted along the coast, and Vancouver has a major studio complex (used for filming shows such as Stargate, Dead Like Me, and I think Supernatural, too) that could be used, too. And there are mountains... you could probably film most of the Farseekers in BC. Except we don't have any castles.
/Users/moniquewinterhoff/Pictures/iPhoto Library/Originals/2008/School exertion to Saint Johns Cathedral/IMG_1018.JPG 
