With space for roughly 20,000 cars, the parking lot that surrounds the West Edmonton Mall in Alberta, Canada, is recognised as the largest car park in the world. Spread across vast expanses of asphalt and multi-storey concrete structures, these parking spots take up about half the mall’s 5.2m sq ft, on what was once the edge of the city of Edmonton. A few blocks away, a similar amount of space is taken up by a…