Submarine windows????
Submarine windows????
...
They are right next to the screen door.
“Submarine windows????”
There are submersibles with windows...
http://www.blanson.com/home/submersible_viewports_domes
http://en.wikipedia.org/wiki/Osprey-class_submersible
http://www.nytimes.com/2008/08/26/science/26alvi.html?pagewanted=all&_r=0
Research subs.