SmartDestinations.com Extra $10 Off on Go Card or Explorer Orders of $150 or more Promo Code. Go City Card provides multi-attraction passes that maximize the fun, savings, and convenience of sightseeing with flexible purchase options for every type of traveler. Passes are available online and at walk-up retail outlets. They provide admission to more than 400 attractions across eleven North American destinations, including Boston, Chicago, Las Vegas, Los Angeles, Miami, New York, Oahu, Orlando, San Diego, San Francisco, and Washington, D.C.