2 Best Sights in Long Island, New York

Taking advantage of some of the darkest night skies on Long Island, this observatory is a prime viewing spot for astronomy buffs and star-deprived urbanites. Atop the barnlike structure is a motorized dome with a telescope you can use to track the heavenly view. Clear skies are the best for observing; avoid coming during a full or almost-full moon.

William K. Vanderbilt's 24-room Moroccan-style mansion, called Eagle's Nest, sits on 43 acres and houses collections that Vanderbilt acquired as he traveled throughout the world. Summer brings various theatrical performances to the mansion's courtyard. The adjacent planetarium is one of the best equipped in the nation, with a 60-foot domed Sky Theater. Sky and laser shows are held regularly.