The Defence of Britain Project – from April 1995 to March 2002, 20000 twentieth century military sites in the United Kingdom were recorded by an army of some 600 volunteers.
Mine Explorer – This website provides photographs and information on many of the disused mines found across the U.K.
Mine Plans Portal – The Mining Plans Portal
Aditnow – AditNow is an information sharing resource and discussion forum for the mine exploration community as well as industrial archaeologists, researchers, historians and anybody with an interest in mine exploration or mining history.
Tomorrow History – Extremely useful site that allows you to compare old OS maps with the current day, invaluable for finding location of old mines.
The Modern Antiquarian – Since launching in March 2000, the site has grown to be a massive resource for news, information, images, folklore & weblinks on the ancient sites across the UK & Ireland
Freds Photos – Someone with a real passion for local history
Tom Leonard Mining Museum – Has some useful maps of mine locations
Yorkshire Aircraft – Aircraft crashes in and around the North Yorkshire Moors
Life on Coatham Marsh – A regularly updated blog of local wildlife
Tommys Underground Exploration – Some excellent photos here
Marske by the Sea – Marske by the Sea by Richard.B.Mann
Remember When – Evening Gazette Local History.