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Vintage photos of:
So here's this new facility -- state of the art. Except it's over a hundred years old. And we've misplaced the caption. Who can tell us what this is? View full size.
UPDATE: Nobody identified this as the world's first indoor skateboard park. But it turns out that Nobody is wrong. The original caption from circa 1905: "New engineering building, big testing tank, University of Michigan at Ann Arbor."