The project is essentially upgrading a pre-existing bike path, known as the M-Path, into a full linear park.

The Brickell Backyard is an urban park along The Underline that includes the Typoe Sculpture Garden, a sound stage plaza, Urban Gym with basketball court, workout stations, and a running track, as well as butterfly gardens with native plants that surround gathering spaces.

This segment of the Metrorail was built along the former right of way of the Florida East Coast Railway's main line between Miami and Kendall, which was abandoned in 1972 and purchased by Miami-Dade County in 1979.

[8] In late 2011, the MetroPath was extended and a 200 ft (61 m) bridge was added over the freeway style entrance to the Snapper Creek Expressway (S.R.

In 2014, plans were made to revamp the M-Path as a linear park, taking after the popular High Line in New York City, by a group known as "Friends of the GreenLink.