Here we go again. Last week's entry still has no guesses, which displeases me; there's gotta be one neo-maxi-zoom-dweebie amongst my readership. UI 38 was finally identified, after some hint-giving by me, as the field near Clear Lake, IA where the plane carrying Buddy Holly, the Big Bopper, and Richie Valens crashed.
Anyhow, time for the new entry:
Where are we? Rot-13 your guesses!