UNStudio has developed the SeoulOne master plan for Hyundai Development Company, converting a former industrial and railway site in northeast Seoul into a 405,000-square-meter pedestrian-oriented community designed for residents across generations. The concept revolves around a 10-minute city framework, placing key amenities - such as housing towers, shops, workplaces, a hotel, sports venues, childcare, elder care, and health services - within easy walking distance. More than 30 percent of the area is allocated to greenery, featuring small parks, rooftop gardens, water elements, and elevated forest paths, while drawing on traditional Korean spatial ideas adapted to the surrounding mountains.