The lower part of the Kaituna River is available for river sledging, which is a more intimate way of experiencing the river - i.e. you get more wet!
There are several rafting companies that offer these experiences.
Another thrill on the water in the Kawarau Jet, which offers trips on Lake Rotorua, you can also experience the thrills of the Hamilton jet at Agroventures on the AgroJet.
We're not sure whether this would be classed as on the water or in the air but parasailing is also an experience you can try in Rotorua if the weather is right.
A bit more serene but no less intense experience is a stand-up paddle lesson or tour.
Lessons can be taken on Lake Rotorua, Lake Rotoiti and around the Maketu coast.
The Rotorua Daily Post Essential 50 lists the city's must-see, must-do and must-try activities and experiences thanks to reader nominations. We'll be highlighting one every day over summer.