The Castle at 433 River Road - Highland Park, NJ Prestigious | Affordable | One-of-a-Kind Step into The Castle, a rare architectural gem that blends historic charm with modern functionality. This prestigious yet affordable office space features five private offices, ideal for professionals, creatives, or wellness practitioners seeking a distinctive and inspiring environment. Whether youre meeting clients or building your dream business, The Castle offers character, convenience, and curb appealall in the heart of Highland Park.