F-1 Test Stand Interior
I did not take these photos, and these are the first photos I've seen of the F-1 Test Stand interior, so the information I can provide for each individual photo is fairly limited. In most cases, the photos appear in the order in which they were taken.
Most or all of these photos appear to have been taken with a fish-eye lens, which photographs more of the confined spaces but which distorts the photos, bowing the edges.
The condition of the interior is fairly poor; apparently it's more than just "fairly poor," as there are several photos in which people are visible wearing hazmat suits.