A glass bottom boat tour to Cathedral Cove, with glass panels on all its vessels so guests can see the marine life below. The tours run through Te Whanganui-o-Hei Marine Reserve, one of the earliest marine reserves in New Zealand and a no-take zone since 1992. The website says Gemstone Bay has a large school of resident snapper that swim among the snorkel trail, and that the reserve also has blue cod, kina, stingrays, octopus and kelp forests. Bookings are made online, and a donation or tree donation can be added to a booking to support local conservation groups. The website says it is about two and a half hours' drive from Auckland, and warns that car parks can be hard to find in busy summer months.