Duration Duration: 45-60mins

Hidden under the surface in Harrison Cove is a unique and beautiful environment – there’s nowhere else in the world quite like it. In the middle of Piopiotahi Marine Reserve, the Underwater Observatory enables you to experience the magic of this special world, previously the exclusive realm of divers.

Descend 64 steps (10 metres) underwater into a large, fully air conditioned viewing area where large windows with excellent optical clarity open your eyes to this deep underwater haven. Unlike an aquarium, the fish are free to come and go; it’s the people who are contained.

Why visit the Milford Sound Underwater Observatory?

  • New Zealand’s only floating underwater observatory is a unique learning experience
  • Be guided through the Milford Sound story on colourful information panels covering culture, heritage, history, geology and wildlife
  • Watch dramatic Milford Road and Homer Tunnel avalanche videos
  • Immerse yourself in a mysterious undersea world and encounter the extraordinary rare black coral and colourful sea creatures teeming just below the surface
  • Thanks to its unique underwater environment, Milford Sound is home to species of black coral usually found at depths of more than 500 metres

How to book the Milford Sound Underwater Observatory

  • Entry is included on all Discover More Cruise experiences
  • Choose to experience it all with our Milford Sound Cruise & Kayak package.
  • OR you can choose as an ‘add on’ to your choice of cruise experiences. (Please allow an additional 45-60 minutes on top of your cruise time)

Please note: Discover More add on is not available on the last cruise of the day.


Cruise Adult Child  
Discover More Cruise Included Included book a Discover More package
Encounter Nature Cruise add on $15 add on $15 book an encounter nature cruise
Scenic Cruise add on $15 add on $15 book a scenic cruise
Nature Cruise add on $15 add on $15 book a nature cruise

See full cruise timetable here

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