The station lies in zone 1 on the Metropolitan, Jubilee, Bakerloo, Circle and Hammersmith & City Lines. As of May 2003, a single journey for an adult from Baker Street to elsewhere in the central area of London, i.e. within zone 1, costs £1.60.
The sub-surface Circle Line platforms are part of the very oldest Underground line, and of the stations on this section of line they are perhaps the best-preserved. Plaques along the platform show old plans and photographs of the station.
The station layout is rather complex. The sub-surface station is connected to the open-air Metropolitan Line station. This is a terminus for most trains, but there is also a connecting curve that joins to the Circle Line just beyond the platforms.
Below this is a deep-level tube station for the Bakerloo and Jubilee Lines. These are arranged in a cross-platform interchange.
wikipedia.org dumped 2003-03-17 with terodump