Discover the coolest parts of a city in a fun, interactive way. If you love the expert knowledge of tours, then it's time to let your boots stray with your cell phone leading the way. Half treasure hunt, half tour, Stray Boots challenges players to find sites, answer questions and complete silly photo challenges from the convenience of their cell phone. Offered in Boston, Chicago, Las Vegas, LA, Miami, Nashville, NOLA, NYC, Philly, Portland, San Diego, Seattle, DC, and San Francisco. Expires January 1, 2015.