Regarding task #86, I will list all underground stations I have visited. I will add to this and include photographs as I make progress.
I am actually fascinated by the London Underground, its stations and its history in general. I enjoy reading about old stations that no longer exist (e.g. British Museum station on the Central Line).
Any new stations (since 29 November 2009) will be shown in bold.
I've now added Overground Stations since they are also operated by TFL.
I will count a station as "visited" if I have actually alighted or caught a train there, or simply changed trains - not if I have simply gone through on a train.
Stations I have visited:
Acton Town (District and Piccadilly Lines)
Amersham (Metropolitan Line)
Angel (Northern Line)
Aldgate (Circle and Metropolitan Lines)
Aldgate East (District and Hammersmith & City Lines)
Arnos Grove (Piccadilly Line) - 6 October 2018
Arsenal (Piccadilly Line) - 16 July 2016
Balham (Northern Line)
Baker Street (Bakerloo, Circle, Hammersmith & City, Jubilee and Metropolitan Lines)
Bank (Central, Northern and Waterloo & City Lines)
Barbican (Circle, Hammersmith & City and Metropolitan Lines)
Baron's Court (District and Piccadilly Lines) - 26 September 2010
Bayswater (Circle and District Lines)
Belsize Park (Northern Line) - 30 June 2012
Bermondsey (Jubilee Line)
Bethnal Green (Central Line) - 22 July 2010
Blackfriars (Circle and District Lines)
Bond Street (Central and Jubilee Lines)
Borough (Northern Line) - 2 July 2010
Bow Road (District and Hammersmith & City Lines) - 9 March 2010
Caledonian Road (Piccadilly Line) - 3 October 2010
Camden Road (Overground) - 17 January 2020
Camden Town (Northern Line)
Canada Water (Jubilee Line and Overground) - 28 July 2010
Canary Wharf (DLR and Jubilee Lines)
Canning Town (DLR and Jubilee Lines) - 6 December 2009
Cannon Street (Circle and District Lines)
Chalfont & Latimer (Metropolitan Line) - 14 May 2010
Chancery Lane (Central Line)
Charing Cross (Bakerloo and Northern Lines)
Chingford (Overground)
Clapham Common (Northern Line) - 2 August 2019
Clapham North (Northern Line) - 25 July 2009
Cockfosters (Piccadilly Line) - 21 October 2017
Colindale (Northern Line) - 27 November 2015
Colliers Wood (Northern Line) - 18 November 2014
Covent Garden (Piccadilly Line)
Crystal Palace (Overground) - 5 March 2011
Cutty Sark (DLR)
Dalston Junction (Overground) - 5 March 2011
Dalston Kingsland (Overground) - 5 March 2011
Earl's Court (District and Piccadilly Lines)
East Finchley (Northern Line) - 7 June 2018
East Ham (District and Hammersmith & City Lines)
Edgware (Northern Line) - 23 October 2010
Edgware Road (Bakerloo, Circle, District and Hammersmith and City Lines)
Elephant & Castle (Bakerloo and Northern Lines)
Elverson Road (DLR) - 23 September 2017
Embankment (Bakerloo, Circle, District and Northern Lines)
Euston (Northern and Victoria Lines)
Euston Square (Circle, Hammersmith & City and Metropolitan Lines)
Farringdon (Circle, Hammersmith & City and Metropolitan Lines)
Finchley Road (Jubilee and Metropolitan Lines)
Finsbury Park (Piccadilly and Victoria Lines)
Fulham Broadway (District Line)
Gloucester Road (Circle, District and Piccadilly Lines) - 7 May 2011
Goldhawk Road (Circle and Hammersmith & City Lines)
Gospel Oak (Overground) - 23 June 2013
Goodge Street (Northern Line)
Great Portland Street (Circle, Hammersmith & City and Metropolitan Lines)
Green Park (Jubilee, Piccadilly and Victoria Lines)
Hackney Central (Overground)
Hackney Wick (Overground)
Hammersmith (District and Piccadilly Lines) - 2 October 2011
Hampstead (Northern Line)
Harrow-on-the-Hill (Metropolitan Line)
Heathrow Airport Terminals 1, 2 and 3 (Piccadilly Line)
Heathrow Airport Terminal 5 (Piccadilly Line) - 1 October 2016
High Barnet (Northern Line)
Highbury & Islington (Overground, Victoria Line)
Highgate (Northern Line) - 25 June 2016
High Street Kensington (Circle and District Lines)
Hillingdon (Swakeleys) (Piccadilly Line) - 15 August 2017
Holborn (Central and Piccadilly Lines)
Holland Park (Central Line)
Holloway Road (Piccadilly Line) - 7 January 2010
Homerton (Overground) - 11 July 2014
Hoxton (Overground) - 29 September 2012
Hyde Park Corner (Piccadilly Line)
Island Gardens (DLR)
Kennington (Northern Line)
Kentish Town (Northern Line - 6 February 2011)
Kew Gardens (District Line)
Kings Cross St. Pancras (Circle, Hammersmith & City, Metropolitan, Northern, Picadilly and Victoria Lines)
Knightsbridge (Piccadilly Line - 7 February 2010)
Lambeth North (Bakerloo Line)
Lancaster Gate (Central Line - 12 September 2010)
Latimer Road (Circle and Hammersmith & City Lines - 14 April 2017)
Leicester Square (Northern and Piccadilly Lines)
Leyton (Central Line)
Limehouse (DLR)
Liverpool Street (Central, Circle, Hammersmith & City and Metropolitan Lines)
London Bridge (Jubilee and Northern Lines)
Manor House (Piccadilly Line - 3 July 2015)
Mansion House (Circle and District Lines)
Marble Arch (Central Line)
Marylebone (Bakerloo Line)
Mile End (Central, District and Hammersmith & City Lines)
Moorgate (Circle, Hammersmith & City, Metropolitan and Northern Lines)
Morden (Northern Line - 9 December 2012)
Mornington Crescent (Northern Line)
Monument (Circle and District Lines)
North Greenwich (Jubilee Line)
Notting Hill Gate (Central, Circle and District Lines)
Oakwood (Piccadilly Line) - 6 October 2018
Old Street (Northern Line)
Oxford Circus (Bakerloo and Victoria Lines)
Oval (Northern Line - 19 February 2011)
Paddington (Bakerloo, Circle, District and Hammersmith & City Lines)
Parson's Green (District Line)
Perivale (Central Line)
Piccadilly Circus (Bakerloo and Piccadilly Lines)
Poplar (DLR)
Putney Bridge (District Line)
Queensway (Central Line)
Regent's Park (Bakerloo Line)
Rickmansworth (Metropolitan Line)
Royal Victoria (DLR) - 21 February 2015
Russell Square (Piccadilly Line)
Seven Sisters (Victoria Line)
Shadwell (DLR and Overground) - 31 August 2012
Shepherd's Bush (Central Line)
Shoreditch High Street (Overground) - 21 April 2012
Sloane Square (Circle and District Lines)
South Kensington (Cicle, District and Piccadilly Lines)
St. James's Park (Circle and District Lines)
St. Paul's (Central Line)
Stanmore (Jubilee Line)
Stepney Green (District and Hammersmith & City Lines)
Stockwell (Northern and Victoria Lines) - 18 November 2014
Stratford (Central, DLR and Jubilee Lines)
Swiss Cottage (Jubilee Line)
Temple (Circle and District Lines)
Tooting Broadway (Northern Line) - 5 March 2011
Tottenham Court Road (Central and Northern Lines)
Tottenham Hale (Victoria Line) - 1 August 2010
Tower Gateway (DLR)
Tower Hill (Circle and District Lines)
Turnpike Lane (Piccadilly Line)
Vauxhall (Victoria Line)
Victoria (Circle, District and Victoria Lines)
Walthamstow Central (Victoria Line) - 27 March 2011
Wapping (Overground) - 14 June 2013
Warren Street (Northern and Victoria Lines)
Waterloo (Bakerloo, Jubilee, Northern and Waterloo & City Lines)
Wembley Central (Bakerloo Line)
Wembley Park (Jubilee and Metropolitan Lines)
Westbourne Park (Circle and Hammersmith & City Lines)
Westferry (DLR)
West India Quay (DLR) - 29 October 2010
Westminster (Circle, District and Jubilee Lines)
West Ham (District, Hammersmith & City and Jubilee Lines) - 29 January 2010
West Kensington (District Line) - 10 August 2017
Whitechapel (District and Hammersmith and City Lines) - 13 October 2010
White City (Central Line) - 9 November 2017
Willesden Green (Jubilee Line) - 27 November 2016
Wimbledon (District Line)
Wood Green (Piccadilly Line)
Wood Lane (Circle and Hammersmith and City Lines) - 9 November 2017