Toronto is turning an old airport into a sprawling new neighborhood

The city’s Downsview Airport is set to become the largest urban redevelopment project in North America.

Hudson Yards, the mega Manhattan development, re-envisioned 28 acres of railyards. The Tesla Gigafactory in Nevada, one of the world’s largest manufacturing sites, encompasses 123 acres of factory floors. In Sacramento, an ambitious plan to redevelop the California capital’s railyard will rework 244 acres of industrial space.