Hengefinder: Finding When the Sun Aligns with Your Street (opens in new tab)

Next week in Manhattan, the sunset will align perfectly with the east-west streets of the city grid. It’s beautiful, and people know it. Twice a year, crowds gather to see the brief moment when the sun sits perfectly on the horizon, framed by skyscrapers on either side. It’s called Manhattanhenge, after Stonehenge.