In the years since the first parts of the London Underground opened, many stations and routes have been closed. Some stations were closed because of low passenger numbers rendering them uneconomical; some became redundant after lines were re-routed or replacements were constructed; and others are no longer served by the Underground but remain open to National Rail main line services. In some cases, such as Aldwych and Ongar, the buildings remain and are used for other purposes. In others, such as British Museum, all evidence of the station has been lost through demolition.
In the years since the first parts of the London Underground opened, many stations and routes have been closed. Some stations were closed because of low passenger numbers rendering them uneconomical; some became redundant after lines were re-routed or replacements were constructed; and others are no longer served by the Underground but remain open to National Rail main line services. In some cases, such as Aldwych and Ongar, the buildings remain and are used for other purposes In others, such as British Museum, all evidence of the station has been lost through demolition.