Manhattan solstice
n.— « I’ve heard about a “Manhattan solstice,” when the sun supposedly lines up along the streets. Is it for real? When does it happen?…On May 28 and on July 13, the sun will fully illuminate every Manhattan cross street (not the curved or angled ones) on the street grid during the last 15 minutes of daylight, and it will set on each street’s center line. The sight is breathtaking.» —“Stonehenge in the City” by Michael Pollak New York Times May 21, 2006. (source: Double-Tongued Dictionary)
There is also a “Winter Manhattan Solstice” where this happens at sunrise, also very beautiful.