Wikitravel.org

This is a Worldwide travel guide that looks and feels like Wikipedia (the popular user editable encyclopedia). According to the main page:

• Wikitravel is a project to create a free, complete, up-to-date and reliable world-wide travel guide. So far we have 6931 destination guides and other articles written and edited by Wikitravellers from around the globe.

You can register and create a My Page, track certain articles, and track your own contributions.