Pruned has an entire series of under spaces, reconfigured, re-imagined, repurposed spaces under viaducts of which this example from Milwaukee is just the latest.
New York City has a lot of these dead spaces that are too often used as parking, (and often not even that) that slice through formerly connected neighborhoods.
(I’m thinking specifically of areas under the BQE or the elevated trains in Queens or the Metro North line through Harlem.)
The examples at Pruned offer how these spaces might be returned to the community as gathering and linking spots instead of just blight.
via Pruned