Britain's Maunsell Sea Forts [wiki] were built during WWII as part of the coastal defense system. They were decommissioned in the 1950's, but many of them remain in use for non-military purposes (this is arguably the most famous). Some great photos here. [previously on metafilter]
posted on Apr 25, 2008 - View this thread

Photo albums of German soldiers. Fully scanned photos from the personal albums of German soldiers from the Second World War and the years preceding it.
posted on Feb 3, 2008 - View this thread

Russia in photos: 1941-1945.
posted on May 11, 2007 - View this thread

LA6NCA's WW2 German Radio Collection Pictures and a little history on many WW2 German radios including a cute as a button spy radio and the Lichtsprechgerät 80, an incoherent light audio transceiver. Also featured are a few photo essays of the equipment in use (Enigma, Luftwaffe Signals unit redeploying). [dorian
posted on Feb 8, 2007 - View this thread