Manhattanhenge, or simply the Manhattan Solstice is a biannual occurrence where the setting sun aligns with the east-west streets of Manhattan's main street grid. The term of Manhattanhenge, is twisted off from Stonehenge, which is where the sun aligns with the stones on the solstices. This term was coined in 2002 by Neil deGrasse Tyson, an astrophysicist at the American Museum of Natural History. The pic above shows people on the East Side looking west observing the Sun shining down the canyon-like street. There's a pretty amazing video of it too... Check it out below.