Welcome to one of the Hunter Valley's best kept secret hideaways. The Regents Park is an exquisite Georgian style mansion tucked away in the Hunter Valley, NSW. - The Regents Park is an 1830’s Georgian Mansion that has been beautifully restored. The mansion, built for a judge, was originally part of a 1000 acre estate in the Maitland area. It now sits on 5 acres of magnificent sprawling gardens providing you and your guests with the perfect escape.