290 Prospect Ave Sea Cliff, NY, 11579 Spectacular Waterfront Estate On Just Shy Of 2 Acres. Steps Down To The Water, This Diamond Condition Home Was Built In 1997. Features Soaring Ceilings With Two-Story Entry, Gourmet Eat-In Kitchen, Master Suite With 18' Ceilings And Terraces Overlooking The Harbor, Detached 3 Car Garage, In-Ground Heated Pool, And The Most Beautiful Sunsets Along The North Shore.