This Allendale, NJ backyard was designed to transform a steep property into a natural-feeling outdoor living space. A custom freeform gunite pool blends organic curves with subtle geometric lines, creating a lake-like water feature within the landscape. A waterfall built into the existing grade, natural boulders, and a raised beam wall with sheer descent spillways add movement and architectural contrast. A fire pit lounge, dining terrace, and grilling area provide space for entertaining, while retaining walls, drainage, landscaping, irrigation, and lighting ensure long-term performance.