First, more or less real:
the caves of Dordogne (which make great grist for your roleplaying mill).
Second, more or less imaginary:
Property Listings for my Tartary game (which you could use as a tour guide to interesting real-world destinations).
This last was written in response to Jason Kielbasa's
Constantcon Property Guide. Constantcon is the heady world of gaming via G+ hangouts - it's slowly turning into one giant cross-campaign mashup - first PCs were migrating freely around the multi-GM multiverse, then monsters and magic items, and now people are developing real estate, some of which exists in multiple settings at once. It's wacky times.