In the Point of Interest's page, under the voting star, you can find these icons:

• f Share: to share the page on Facebook;
• +1: to share the content on Google Plus;
• Three falgs: it's an useful tool to mark in different way every point of interest. The flags are:  Wish list, Visited, Favorites. Wish list it's useful to mark evey point of interest you would go . With Visited you can create an archive of the place you had been. Favorites, as the word says, marks the point of interest as your favorite. To mark with one of these flags you have only to to click on the plus sign. When a content is markes the plus sign will became -, to remove mark you have only to click on -. The number above the sign + o - shows how many people have already sign it.

You can see all your marked contents from your Account page.