Here is a link to a site with information about a discounted access pass to many tourist icons. It is available for about twelve U.S. cities.

USA - CityPass

And here is a link to another site that serves fourteen U.S. cities and destinations. Some overlap with the CityPass cities, but they offer a expanded product offering that covers more museums, sights, and tours.

USA - Smart Destinations


You can find similar tourist pass for NYC has The New York Pass and Dallas has the Dallas/Fort Worth & Beyond Attractions Pass and Honolulu has the iVenture CardNew Orleans and Las Vegas have the Power Pass while other cities will have special tourist offers which combine popular area attractions. You can find out if these options exist on the various city forums here on Tripadvisor.