Yes, I always saw Dorne as mixture of Spain, Venice (decadent high culture), Egypt under the Fatimid's, and maybe a touch of South East Asia/India (cuisine etc.). Geographically, parts of Westeros are England (North, maybe Riverlands and Crownlands)- but others aren't- Dorne (western half Sahara, eastern half more Middle East), Iron Isles (Iceland maybe, with touches of Norway/Orkney and Shetlands) and so on. Indeed, culturally, the Riverlands and the North are I believe the only ones that actually resemble England- and even there, the North is also Scotland, and the Riverlands is also Germany- constant invasions, large river connections etc.