I have a reasonable number of geo domains which are making money, although mine are generally more 'normal' suburbs rather than tourist destinations.
Mine aren't directory sites, but more so information portals. I use the GAKT to see what people are searching for in a particular area, and just create pages accordingly.
In terms of monetising I'm just using Adsense at this stage, although I have had a couple of direct advertisers approach me in the past for short term campaigns which paid okay.
And finally, I always stick to geos where I actually know the area. This enables me to properly write about the area rather than just filling the site with generic junk content.