Three Bridges, London

Three Bridges, formally known as Windmill Bridge, is a three-level crossing of bridges in Southall, west London, England. The project was Brunel's last to be finished before he died on 15 September 1859.

Design and Usage
Designed by Isambard Kingdom Brunel, the two cast iron bridges are arranged to allow the routes of the Grand Junction Canal, Great Western and Brentford Railway, and Windmill Lane to cross each other, with the road above the canal which is above the railway.

As the railway was the most recent addition, the design allowed the railway to be in a deep cutting so it wasn't visible from and didn't enter Osterley Park as well as being economically cheaper. Work began in 1856, and was completed in 1859.

The structure is a scheduled monument and is adjacent to a homonymous park