I know this is an old one but it comes up top of Google and all the links provided now seem out of date.
This is the latest list of types Facebook accepts: https://developers.facebook.com/docs/reference/opengraph
If you don't use one of these then the type will default to 'website' which is best used for home pages/summarising a web site.
In answer to the OP you would now want to use a place which will allow you to add lat/long location details.