It's back! Four evenings each year, the sun falls in perfect alignment with NYC's East-West numbered streets, creating a one-of-a-kind sunset view. Word to the wise: the phenomenon, dubbed "Manhattenhenge" by Hayden Planetarium director—and Cosmos star—Neil deGrasse Tyson, is best seen from larger streets like 14th, 34th, 42nd, 57th and 79th. All ages.