London’s Crossrail construction from above

Crossrail is Europe's largest civil engineering construction project, an expansion of London's underground rail network that will connect the outer suburbs to the center of the city and Heathrow airport. This image was taken above the Finsbury Circus Crossrail construction site. Click, drag and zoom to change your perspective.

This feature was created by stitching a series of aerial photographs together. Photo by: Lewis Whyld for CNN