When  the Papago (I-10) freeway was built next to downtown Phoenix, part of the highway was capped to help mend the scars to the surrounding neighbourhoods.  

Known formerly as Margaret T Hance Park (after a former mayor), or colloquially as Deck Park, the space has never reached it's potential for a variety of reasons; most notably a lack of connections to the surrounding neighbourhoods.  As such, it is a favourite hangout for the homeless and skateboarders.  

The City of Phoenix has recognized the problems with the park and is undergoing a re-visioning exercise to renovate the park in time for it's 25th anniversary.