Consider this article – from early 2005.
Prof Piggington linked to it long ago.
I keep it around because it shows distinctions between the cyclicality of different cities. At this point in the cycle, it would be better to look at markets that are less cyclical to avoid plummeting prices.
Also, consider Japanese real estate. I don’t know anything about it, but after 15 years of flatness, it may be ready for growth, and it would get you out of dollars.