Lincoln Tunnel Helix - Credit: Wikimedia Commons
The Lincoln Tunnel Helix, known commonly as The Helix or the Route 495 Helix, is an elevated spiral bridge freeway that carries New Jersey Route 495 to and from the Lincoln Tunnel in Weehawken, New Jersey. It is an oval-shaped 270-degree loop between the Palisades cliffs and the tunnel’s toll plaza. The structure, built in 1937, is owned, operated and maintained by the Port Authority of New York and New Jersey (PANYNJ). Read more on Wikipedia
Source: en.wikipedia.org