Osiedle Otium is an interactive website showcasing residential apartments and houses, built with Next.js, React, Tailwind CSS, Three.js, and React Hook Form. The core feature is the ability to explore detailed 3D models of homes and apartments, allowing users to get a clear view of the interior layout. Interactive masks are also implemented to enable selection of specific units. The site uses a custom scroll behavior, where users navigate through full-screen sections, creating a smooth and modern browsing experience.