There were a few things of interest to aeronautical types. Firstly, there is a helipad [ICAO: NZLF/ Rotorua Lakefront] on the lake front nearest the city area, and the lakes [several of them] are designated as a water aerodrome [ICAO: NZRL/ Rotorua Lakes]. Most of these are located within the Rotorua Control Zone, although a couple of the lakes are within the Tarawera MBZ [Mandatory Broadcast Zone].
The main operator of these is Volcanic Air Safaris, who run both fixed and rotary wing aircraft from these and Rotorua's main airport [ICAO; NZRO].
First up are some pictures of the lake front heliport/ seaplane base on Lake Rotorua. Pictures include the following [all aircraft registered to Volcanic Air Safaris]:
Cessna U206G, ZK-FEO and de Havilland Canada DHC3 Beaver, ZK-VAS
Robinson R44 II, ZK-HAD
Bell 206B, ZK-IVS
Pictures of the seaplane base/ heliport and the "terminal"
Lastly, and despite all the signs, there were hundreds of flying garbage collectors/ seagulls in the area... along with ducks, geese and goodness knows what else. The seagulls could be fed by hand [which is how I got these photos - while others were feeding them...]