City Sightseeing is the number one operator of double-decker tours in the world. The ultimate way to see a new city is from the top deck of an open-top bus. Sightseeing tours are narrated and you can Hop On and hop Off at multiple locations throughout the destination.

In late 2005 operations started in San Francisco. Three tours are offered, the Downtown Tour (Hop On Hop Off),the Golden Gate Tour and the Night Tour. Tours last between 75 and 90 minutes and are narrated by expert local tour guides.Tickets are valid for 24 hours. At present, tour departures are every 30 minutes. Frequency will increase to every 15 minutes by June 2007, as the fleet is increased to 12 vehicles.

San Diego carried its first passengers in March 2006. San diego's warm and dry climate make it ideal for sightseeing year-round. The tour includes Old Town, Balboa Park, the GasLamp District and much more.

Plans to open many more location are being discussed. Please check this site for new operations planned in 2007.