On 22 June 1907, the Charing Cross branch of the London Underground opened. An estimated 127,500 people took advantage of the free fare on opening day.
This photograph was taken near Golders Green tube station, which was the terminus of the line. Until the Underground was built, Golders Green was almost completely rural. Easier transport led to many housing developments going up in the area very soon thereafter. The Northern Line was extended to Edgware in the early 1920s.