The region north of Auckland has more history, Maori and European, than most of New Zealand. The important Treaty of Waitangi was signed here in 1840. A generally warm, almost sub-tropical climate, sandy beaches and sheltered waters encourage recreational activities, including deep-sea fishing, scuba diving and sailing. The ill-fated "Rainbow Warrior" is one of numerous wrecks that draw divers to Northland. Inland are the country's remaining kauri forest areas and a noted hot spring. Whangarei is the main regional centre, about 170 km north of Auckland. Its rejuvenated waterfront area is worth visiting, particularly for the fascinating Clapham's Clock Museum.