Walk to Lake Matheson near Fox Glacier for the famous "mirror lake" reflection of Mount Cook and Mount Tasman

Walk to Fox Glacier viewpoint via the free valley track (1 hour return)

Heli-hike onto Franz Josef or Fox Glacier (3-4 hours including helicopter flight; from $400-450 NZD — expensive but unforgettable)

Take a jade/pounamu carving workshop ($85 NZD)

See glow worms on the Terrace Walk at dusk (free, Franz Josef)