I got two of the larger U-boot bases in WWI, Zeebrugge and Ostende. getting an eBook about them as we speak, about the raids that is.
EDIT: Keltos, you are so lucky that you can go and do things like that. I'm stuck in the Midwest taking college courses that are barely paid for, and although I have a love for the sea, I only get about 3-9 days a year to truly swim in the atlantic. No boating, just crabbing