The Brixton windmill was built in 1816 for the milling of flour and wheat meal. It relied totally on wind power until 1862, as technology changed so did the operating of the mill. Water to steam engine to gas engine. After WWII as it lay abandoned plans to demolish it and build a block of flats were proposed and finally rejected. It has since undergone several restorations, the last one in 2011. Check their website to see what days it is open to visitors.
To help visitors to find the Olympic Venues see my new Olympic Venue map in the sidebar (just below the weather widget).