Walk the first part of the Routeburn Track, one of New Zealand's Great Walks.
Once you have finished the Milford Sound Cruise, drive back down the Milford Highway. You will pass the car park for the Divide, the beginning of the Routeburn Track. Park here and walk up to Key Summit. Immediately panoramic views of snow-capped peaks begin to unfold. Take the turn off to Key Summit and see views from the top which are unforgettable.