The only botanic gardens in NZ specialising in native flora, Otari features more than 1200 plant species including an extant section of native bush containing the city's oldest trees (such as an 800-year-old rimu). There's also an information centre, an 18m-high canopy walkway, 11km of walking trails and some beaut picnic areas. It's located about 5km northwest of the centre and is well signposted; bus 14 passes the gates.