The Millennium Bridge - dubbed the "wobbly" bridge - over the Thames had to be closed for more than 18 months while engineers carried out modifications to make it more stable.
You hauled lawn chairs onto the abandoned elevated train tracks at Tenth Avenue and 29th Street (where the High Line now runs) and had makeshift parties in the gravelly grown-over grasses on the trestle bridge, bathed in the orange-black air of urban nighttime.
By comparison, China's 36 kilometer (22 mile) Hangzhou Bay Bridge, the world's longest sea-crossing bridge, over seven times the length of the Mumbai bridge, took four years to get completed.