[Strike Witch]

Well, okay.

Basically, it's in a dark pine forest, only there's a large hole in the ground, carved out of the rock. At the bottom is an old destroyed power station. The sky is dark, and stormy, constantly thundering but never raining. There's no way out of the ravine, and the forest rings it on all sides. The power station is small and totalled, and mostly concrete, so not as much rust.

There is a sort of musical note in the air that repeats at 3 minute intervals, a sort of soft, synthesized riff that consists of three rising "er" noises ending in a second of static.

The only monster is the Kantai. It's behind a concrete wall in the open.
It's a floating rock with carved buddhist-type faces and limbs into it, and they all have their eyes shut. It just floats there, surrounded by other small floating rocks.

And if you enter the area when the musical note happens, it's eyes open and it's faces display rage, then the limbs unfurl and grab as many smaller stones as they can and hurl them at you very fast.

And that's it. It doesn't represent any of my emotions or memories, just my fear of something totally and utterly unexplainable, that I can't put into any context, religous or scientific or abstract. It's my fear of the "WTF".