Located on a rocky outcropping floating on the Hudson River, the Ledgerock House is a rare architectural masterpiece. The 15,000-square-foot estate is one of the few homes built before laws required residences to be built at lead 100 feet from the river, meaning it affords views like no other. Designed by architect Lee Ledbetter, the steel-frame structure is clad in French limestone on the exterior, while exotic woods and rare stones from around the world line the interior. The main house includes five bedrooms, seven bathrooms, a theater room, an indoor swimming pool, spa, and gym, along with 5,000 square feet travertine decking that features a built-in gunite pool, outdoor kitchen, fire pit, and hot tub hovering above the Hudson. All situated on 10 acres, the property comes with an additional apartment for staff, a guest house, and an 18-car garage, and it provides arrivals from the air and sea with a helipad and a dock for boats and seaplanes. The sprawling mansion will go up for auction with no reserves online starting January 18, 2023.