Purchase a mural, trace a large circle onto the surface and cut the circle shape out. Apply the mural to the wall, and paint a frame around it to give the impression of a porthole. Large round mirrors can also provide this effect, especially if they have white, blue, silver or red trim.
Nautical accessories can include: models of lighthouses and sailboats, sailor flags, anchors and oars, real boat lifesavers, nautical lighting, lighthouse lamps, lighthouse rugs, captain's wheels, nautical clocks, fish netting, wooden trunks, treasure chests, pirate or sailor figurines, seashells, maps, compasses and telescopes.
Don't allow yourself to make an error of that nature!
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