On June 17, 1940, two B-18 bombers from Mitchel Field collided in the air above Bellerose, Queens. The planes plummeted to the streets below, killing all eleven crew members and one woman whose house was set on fire by flaming gasoline. One of the deceased airmen was Hugh Palmer Bedient, whose father, Hugh Carpenter Bedient, had achieved some measure of fame as a baseball player by striking out a record 42 batters in a 23-inning semipro game in 1908 and by outdueling Christy Mathewson in the 1912 World Series.
Because sometimes it's too hard to come up with a new street name (map).
There was once a path — for both horses and pedestrians, apparently — that ran beside the Grand Central Parkway between Cunningham Park and Alley Pond Park. What you see above is an underpass built to carry the path beneath Union Turnpike. The path is now long gone, and this underpass was sealed off at some point (as was another beneath nearby Springfield Boulevard), but both ends of the underpass have since been broken open. In addition to what remains inside the underpass, some of the path's old railings can be found in the woods outside.
You can see the path in this 1951 aerial view running just to the northwest of the parkway. The underpass beneath Union Turnpike is visible in the middle of the image. For comparison's sake, here's a 2010 aerial view of the same area (with the roadways labeled).