Interesting. The one place that I wanted to go back to was Flanders... in fact, the World War One theatre across Northern France and Belgium. It had such an impact on me in 2003 that it seemed natural that in 2007 (the years coinciding with Paris Brest Paris) that I take Machka through so she could experience it, too.
For me, returning is more an enhancement of the previous experience. We've talked recently about going back to the south coast of the state where we live, and there are parts of Tasmania that I would have no trouble revisiting. Likewise Canada, and I would like to go back to the New England area of the US.