The Foursquare Time Machine

Now you can relive the thrill of the time you went from your house to a coffee shop to your job to a sandwich place to the grocery store to your house to a friend’s house to a bar and then back to your house.

— Doug Aamoth, Foursquare Time Machine Feature Lets You Retrace Your Steps All Laser-Like on The Foursquare Time Machine (actually quite good).