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Nikon D700 + Nikkor 70-200mm f/2.8 @ 70mm — ¹/1000 sec, f/6.3, ISO 200 — map & image data — nearby photos
What Kind of Place am I?
The foreground is a marina, but what's just beyond that?

It's been a while since I posted one of my “What am I?” quizzes, so here's a new one. But let me be up front about one thing: the picture above is a daytime picture that I've tried to make look like it was taken at night. It's really dark because it was an area with few lights, and there was no moon.

On our trip last week to Bunny Island, we stayed at a hotel on a mountain overlooking a small marina. This hotel, the Bella Vista Sakaigahama (ベラビスタ境ガ浜) had, by far, the best baths I'd ever been to.

Among them was a large open-air hot bath with a great view of the sea, and in that view near the shore was a small marina and a large complex that I couldn't quite figure out what it was. The photo above (from my room during the day) approximates my first view of the complex (from the bath at night). There was no moon so it was quite dark — even darker than the photo above conveys — but I could tell that there are boats, and beyond that some big structure with pipes and tanks and such.

I couldn't figure out exactly what it was, but assumed it was related to the marina and the boats' need for gasoline, but with all those pipes it looks to be related to the manufacture of gasoline more than its distribution, and that makes no sense at a marina, so I was left scratching my head.

Given this slightly-more-detailed view than I had then, can you figure it out?