YIC took a trip to Doubtful Sound - one of the fiords. From the sea, the entrance to the fiord appears very narrow. Captain Cook "doubted" the wisdom of mooring there, hence its name. The Sound is quite a trek from Te Anau. It entailed a boat ride over Lake Manapouri (the second deepest lake in NZ) to West Arm where there was a visit to the Manapouri hydro-electric power station. After a bus ride over Wilmot Pass, there was a 3 hour cruise around The Sound on a 20 seater boat. The cruise went the length of the sound (40km) with a peek at the seal colony at the sea-entrance. The views were quite stunning as these photos show.
Manapouri power station. It is 178 metres underground and feeds on water from the lake which is discharged via 2 tailraces into Doubtful Sound.