China is the midst of several megaprojects that will transform its cities.

Over the next decade, China plans to encourage 250 million people (29 times New York City’s population) to move into the country’s growing megacities.

To cope with that huge migration, the country has invested tens of billions of dollars in giant infrastructure projects.

Touted as an engineering wonder, the world’s longest sea bridge, which connects Hong Kong, Macau and mainland China, includes a snaking road crossing and an underwater tunnel.

Called the Hong Kong-Zhuhai-Macau Bridge, the project is expected to cut travel time in half.

Commuters will be able to travel across the Pearl River Estuary from Macau to Hong Kong in about an hour.