Baker Street Underground Station is a major station on the London Underground network, located in the Baker Street area of London. It opened in 1863 and is one of the oldest underground stations in the world. The station serves multiple lines, including the Bakerloo Line, Circle Line, Hammersmith & City Line, and Metropolitan Line, making it a key interchange for commuters and tourists alike. The station is known for its distinctive architecture and features a large, spacious ticket hall. It is also famous for its connection to Sherlock Holmes, as the fictional detective's residence at 221B Baker Street is nearby, attracting many visitors interested in the literary history of the area.