This third and final special issue of Civil Engineering on the London 2012 Olympic and Paralympic Games covers the infrastructure legacy of the games, the delivery of which was fundamental to the success of the UK bid. These eight papers illustrate that the infrastructure legacy goes well beyond the immediate confines of the vast new Queen Elizabeth Olympic Park in east London - the largest green space to be created in London for over a century. It includes long-term transport benefits, new communities, flood alleviation and effective re-use of temporary facilities.