Medium Size On30 Layout in the Backyard

This layout is slightly larger than my first: a full 48" x 36". It started with an old bulletin board, with layers of pink foam added. The hills are made of Great Stuff spray foam, which worked perfectly -- It's easy to carve when dry, and very lightweight. No plywood, no nails, no plaster anywhere on the layout.
The trains are mostly Bachmann, of course. The 2-4-0 started life as a Forney, but with a tender [from Wiseman] it can take the 16" radius curves easily.
The video is longer than I expected, so if you don't like watching small trains go round in circles...