The Montauk Lighthouse Run (on Rt 27) - By nielsm

It is nice scenery, but this is also the main road in the Hamptons. As such there is a ton of traffic in the warmer months. The lighthouse at the end is a great view and picture opportunity, but it may take a while to get there stuck in bumper to bumper traffic. Best options are to go in the off-season, or very early morning to avoid the traffic.