432 Park Ave., the tallest building on the East Side, is one of the 13 skyscrapers completed between 2004 and 2015. View Full Caption DNAinfo/Shaye Weaver

Forget walking on the sunny side of street.

The streets of Manhattan south of 60th street are bound to get darker as an unpredecented boom in the construction of tall buildings reshapes the borough's skyline.

An infographic posted by National Geographic shows what that skyline will look like once the 15 buildings under construction and the 19 other skyscrapers proposed are erected.

Since 2004, Manhattan, previously home to 28 buildings 700 feet or taller, has made room for 13 more skyscrapers.

New buildings will be clustered around Hudson Yards, the World Trade Center and the southeastern corner of Central Park.

Once its completed, the 99-story skyscraper Central Park Tower will be the tallest building in country by roof height.

While the construction upsurge means more high-rise penthouses for billionaires and more commercial space for corporations, it means more shadowy streets for the hoi polloi.

The solution to that? The city could build publicly accessible rooftop gardens, Fast Company proposes, so we can all get our Vitamin D.