On an obscure side street in Williamsburg, in the back of the driveway, there's a garden shed that is the... Holland Tunnel Gallery. (The owner is Dutch, and an artist who's lived there for years.) I've been stopping by periodically for about five years, they get a real diversity of shows--sometimes dozens of small pieces, sometimes a site specific sculpture. And a few years ago, they actually reproduced the gallery, in toto, in a Brooklyn-in-Florida exhibit at an art museum down there. It's only open weekends, and closed July/August.