As with many east side dead-end streets this one is reserved for expensive apartments, private schools and some unique park space. I'm always fascinated by these end-of-the-line roundabouts. We're so used to the standard midtown intersections that it's easy to forget that they all terminate abruptly on either side of the island.
The Glenwood Luxury Apartments take up most of the space on the north side of the street while the south side is a mixture of schools and housing. 2/3rds down the street John Jay Park can be found, though it's not directly accessible from 76th Street itself, you can wander north towards Cherokee Place to get in. As the park rises higher and the elevation of the street dips lower to meet the FDR, the street switches to a pattern of paving stones. At the end of the block a large planter surrounds a typical double red light "dead end" marker. I was surprised that you could walk along a narrow sidewalk on the FDR, separated from the quick-moving traffic by only a small metal barrier. Not exactly the most comfortable stretch of sidewalk in the world, but I guess if just have to get to 78th street and you're terribly opposed to the west side of John Jay Park, then this is the place for you.