Last night, as I was drifting off to sleep, I started dreaming, and I immediately recognized the place. I thought, "Where have I seen this place before?" and starting feeling all deja vu-y. And then I realized (still mid-dream) that I'd dreamt that place before. I had dream deja vu of a dream. Awesome.
The place in my dream looked a bit like this, but with wide doors opened up to sunshine and fresh air:
Note: According to the World Is Round site, that photo is of Oia, on the Greek island Santorini. Too bad I've been to Greece twice in my dreams and never in actuality.