Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
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."