This is probably recognizable, being the Roman Colosseum, but from the inside showing the under-floor structure. At the time I didn’t figure I’d ever be back, but as it turns out I did have a chance to visit again about ten years later. I’ll eventually look through those pictures and see if, with a way more impressive camera I was able to get a better picture.
Picture taken with Olympus C2040z, lens @ 7.3mm (41mm equiv), f/6.3, 1/400 sec, ISO 100