A former banker is hoping to transform some of London's abandoned Tube stations into tourist attractions.
Ajit Chambers is working with the Ministry of Defence (MoD), which owns many of the stations, to try to lease some of the sites.
Mr Chambers is also in talks with Mayor Boris Johnson, as Transport for London owns the network, to support his plans.
It is hoped Brompton Road station, which closed in 1934, could have a restaurant and even a climbing wall.
The west London station, on the Piccadilly line, opened in 1906 but was permanently closed 28 years later when nearby Knightsbridge was modernised and given a new entrance.
Approximately 21 stations are closed on the network and many are owned by the MoD. Some were used during World War II.
Brompton Road station is considered the flagship site as it was used by Prime Minister Winston Churchill as a secret command centre.
Mr Chambers, who owns The Old London Underground Company, said: "This site is perfect for what we want to use it for.
"We would like to have a rooftop restaurant, have a tourist attraction and the deep drop shafts for climbing walls.
"Imagine the history and the historic meetings that went on here."
Mr Chambers said Rudolf Hess, Adolf Hitler's deputy in the Nazi Party, was brought to Brompton Road station to be debriefed after being captured in Scotland in 1941.