Completely hollow. I tried to make sure there wasn't too much of my usual messy building on the inside since it's very easy to see the interior through all the windows.

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The roof comes off (not easily) to make it easier to build and also to be able to access any issues on the inside after everything was built.

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Sign engraving done by The Write Brick. Yes, the sign is spelled 'wrong' in reality, too - the official name of the county does not have a space: "DuPage". However, this is how the actual sign looks so this is how I had it engraved.

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Another thing they're doing this summer is removing all the vines from this side of the building. But I liked the vines, so they stayed in (also this side would be really boring without them).

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