Avonlea Highlands, Cartersville, GA, 30121. Bedrooms: 1-3. At Avonlea Highlands, exceptional design is blended with the finest materials to provide peaceful, gracious living. Whether you prefer relaxing by the pool or enjoying a strenuous game of tennis, Avonlea Highlands offers a range of wonderfully equipped amenities set amid a pristine wooded countryside. Quality extends to every facet of Avonlea Highlands - from meticulously landscaped surroundings to the high level of service we bring to every one of our residents.