Dazzling blue ice, ice cave photo ops, and helicopter rides to and from the face of Franz Josef: it's no mystery why these small-group excursions are popular. The standard trip involves three hours of guided rambling on the ice ($459); the daring can seize an ice-pick for a five-hour ice-climbing tour (adults only, $575). Protective gear and safety briefing included.

No head for heights? The three-hour 'Glacier Valley Walk' (adult/child $75/65) doesn't access the ice but provides a commentary on the forces that created it, following the Waiho River up to the moraine with a chance to get beyond the public barriers safely.

Their standard trip is priced the same for adults and kids.