Thanks for asking; the perfect tiny house -- 35ft R-license park model trailer. Max length to be able to just hook up and go (although this example has been on the County tax rolls for decades) but no holding tanks.
Not a recreational Airstream, It was built by their subsidiary Mobile Industrial in Santa Fe Springs, CA, in 1962 for the Southern Pacific railroad. An aluminum tube with fiberglass end caps.
edit: No pictures of the Fortress of Solitude, but here's an identical one:
http://www.airforums.com/forums/f537...er-112376.html
Mine has a bare metal interior with white wallpapered partitions. Window-hung air conditioner.