Welcome to Duplex Penthouse Residence 3601 - a one-of-a-kind, custom-built, two-story private penthouse soaring above River North. Rising sky-high with dramatic 26-foot ceilings and sweeping 180 city views, this iconic residence blends art, architectural innovation, and modern luxury into a truly monumental home in the heart of downtown Chicago. Designed for an ultra-luxury lifestyle, the interior offers an awe-inspiring sense of scale and sophistication. The grand living room features a 26-foot brick stone fireplace, an exquisite crystal chandelier framed in premium wrought iron, and seamless indoor-outdoor flow to two private terraces-perfect for elevated entertaining. The gourmet chef's kitchen is impeccably appointed with soft-touch natural wood cabinetry, Macauba quartzite countertops, a mosaic backsplash, and professional-grade appliances including a 5-burner gas range, hood, and integrated dishwasher. The kitchen opens to an oversized terrace, creating a luxurious indoor/outdoor culinary experience. Three spacious bedrooms include a show-stopping primary suite with a custom dressing room featuring tailor-made cabinetry, soft-touch lighting, specialty bag and shoe displays, Italian finishes, and glass hardware. The second level continues the luxury with a beautifully designed spa bath and custom built-out closets. The lower level is a private retreat, offering a massive entertainment lounge with a state-of-the-art ventless gas fireplace and a bespoke full bar crafted with Italian flooring, quartzite countertops, soft-touch lighting, and dual built-in refrigerators (wine and cooler). Smart-home features include a Sonos surround system, Nest digital climate controls, and motorized remote window shades for the soaring great-room windows. Residents enjoy a 50,000 Sq. Ft of Plaza-hotel-style amenity experience, including 24-hour door staff, fitness center, running track, outdoor pool, sundeck grills, basketball court, sauna, steam room, dog run, billiards, media room, party room, library, dry cleaning service, and package room. Assessments include all utilities except electric. Centrally located in vibrant River North, steps from parks, galleries, world-class dining, shopping, and transportation-Penthouse 3601 is the epitome of Chicago luxury living.