This paper outlines the process of creating a sustainable online community for www.britainfromabove.org.uk. This online archive of historic aerial photographs combines open collections access with elements of crowd sourcing and social engagement. Britain from Above is a four year Heritage Lottery funded partnership project between English Heritage and the Royal Commissions on the Ancient and Historic Monuments of Scotland and Wales. The project explores the strengths and weaknesses of the different approaches to building a committed and sustainable user base beyond the lifetime of the project through recruiting ‘virtual volunteers’ who populate the website with memories and personal photographs and provide essential information for the cataloguing process through identifying unlocated photographs. Presentation at: The Museums Computer Group 'Museums on the Web' conference 2013 (UKMW13) https://twitter.com/search?q=%23ukmw13 Tate Modern, 15 November 2013. The theme for UKMW13 was ‘Power to the people’. The Museums Computer Group: connecting, supporting, inspiring museum technology professionals