Sometimes there are blocks in a neighborhood that are "dead" space, with nothing of interest. Here's one at 77th St and Columbus Ave
The Columbus Ave BID transformed it into a street park.
Cost $100,000. link
There are other dead streets throughout the city that could also be made over like this...
18th Street and 7th Avenue dead street
Live streets can become parks too, as thet did at FIT on 27th st between 7th and 8th avenues