Miami is getting a $120 million urban park from the designer of The High Line

Miami's Metrorail transit system, the majority of which runs above ground, stretches 24 miles from south to north in the city. But the areas underneath the metro's two lines, covered in dirt, grass, and asphalt, are mostly unused by residents.

Now the city is turning 10 miles of space beneath to Metrorail into a new park and pedestrian path that will connect South Miami, Coral Gables, and downtown Miami.

Called the Underline, the project is expected to cost $120 million. In late 2016, the City of Miami committed $50 million to build it, and the rest of the money is still being fundraised.

Construction is underway and should wrap up by 2020. Check out the project below.