At more than 150 years old, this is New Zealand's first botanical garden. The New Zealand Gardens Trust ranks the country's public gardens according to their importance on a national and global scale, and only six of them have been deemed "internationally significant." Two of those six are in Dunedin—this place is one, and the other is at Larnach Castle. The Dunedin Botanic Garden's 30-plus hectares (about 75 acres) are filled with flowers, shrubs and trees, including many native species. The garden is especially known for its rhododendrons and camellias. One section displays plants from around the world, grouped by their geographic regions of origin. Admission is free.