Question: What attraction, located on Heart Island, was built by the G. W. & W. D. Hewitt architectural firm?
Sentence (from "G. W. &amp; W. D. Hewitt"): The firm specialized in churches, hotels and palatial residences, especially crenelated mansions such as Maybrook (1881), Druim Moir (1885–86) and Boldt Castle (1900–04).
Relevant evidence: Yes