Set on an exquisitely .39 acre landscaped corner property in desirable Riverview Manor, just steps from the Croton Aqueduct Trail, this beautiful 4-BR 2500 sf Mid-Century Modern home with seasonal river views offers a perfect blend of architectural significance and natural beauty. Designed by acclaimed architect Martin Lowenfish, the home overlooks the bucolic Colonial Springs Pool, a private, spring-fed pool with priority membership for the new homeowner. The home's broad bluestone entry patio flows inside to create a sweeping entry hallway from which the main level rooms are arranged. A showstopping great room is the highlight of this home- an exceptional open-concept space for family gatherings and large-scale entertaining. Sparkling seasonal views of the Hudson River permeate through a broad expanse of picture windows, while glowing sunsets can be savored year-round. Hardwood floors, cathedral ceiling with wood beams, and a gorgeous wood-burning fireplace with split-ledge stone all lend character and natural beauty to the space. From there, French doors lead to an expansive deck to enjoy both the view and the assortment of lush plantings offering privacy. Updated in 2018, the modern eat-in kitchen is flooded in eastern light and features Caesarstone countertops, stone floor, stainless appliances, generous picture window, and glass door to a level side yard. Enjoy green views from all three bedrooms on this level. An expansive skylit primary suite is serene and sunny, featuring a walk-in by California Closets and designer bath. A custom wood staircase off the entry is roomy and bright, leading to a walk-out lower level. Here, an expansive family room offers ceramic floors, a second kitchen with granite counters, and a series of picture windows to a secluded stone patio and seasonal views of the Hudson River. A fourth bedroom, separate home office, full bath, laundry room, 2-car garage, and copious storage complete this level and provides potential for an accessory apartment. Additional attribute: a whole house water filtration system. Besides its stunning landscape of verdant privacy evergreens, two pollinator gardens, and blooming shrubbery, residents enjoy priority membership to the Colonial Springs Pool and immediate access to the Croton Aqueduct Trail. With award-winning Dobbs Ferry schools, a vibrant downtown, and a 40-minute train to GCT, this is a must-see. Indoors and out, 80 Colonial represents a rare opportunity to embrace sophisticated living in a natural sanctuary.