During the day, this patch of land in sparsely populated Central Texas is not remarkable. Eleven buildings, nearly identical, look like bland, oversize backyard sheds. Several large R.V.s are parked nearby.

Not long ago, cows grazed here.

But as the sun sets on a clear day, the buildings groan and creak as the roof of each shed rolls back, like the sliding lid on a wooden box.

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