I browse through a lot of sites on any given week, and a few weeks ago, I ran into Meosphere. Essentially, Meosphere is over 2500 check lists and maps for marking where you've been and what you've done, and to help you plan where you want to go and what you'd like to do.
Some of the lists include selections such as Strangest Foods You've Eaten to Subway Systems You've Ridden On and all sorts of things in between. With the possibility of adding new items to many lists, and the chance to discuss with anyone willing to share their lists, Meosphere is sure to be an interesting browse.
Go ahead and take a look, you might find a few things you'd like to try.