URL Mod Rewrite with Region,Country and City

I’m trying to make a Rewrite rule that will do the following:

http://www.domain.com/index.php?region=europe

rewrite like:

http://www.domain.com/europe

http://www.domain.com/index.php?region=europe&country=france

rewrite like:

http://www.domain.com/europe/france

http://www.domain.com/index.php?region=europe&country=france&city=paris

rewrite like:

http://www.domain.com/europe/france/paris

I have absolutely no clue, been trying for a while but not getting what I want.

Anybody that can help me into the right direction?

Thanks!!

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