I found that when spreading out the spackle to build the road (a finger is the tool of choice for this one!) it looks like cobble stones. I guess, when it is painted with a gray/brown wash it'll look like the real McCoy.
Meanwhile, I figured out that I wasn't the first to come up with that idea ... but, hey, the steam engine wasn't invented by only one person either.
OLYMPUS CORPORATION E-1, f/5.6 @ 14 mm, 1/50, ISO 400, No Flash
© Photography by cgbier