Routeburn Track  [New Zealand, 2012]
Key Summit is just an hour's scramble from the Milford Sound road and only a little over 900 metres high, but the 360-degree views are sublime - in this case, towards the Darran Mountains with Mt Christina (2500m, left) and Mt Lyttle (1900m). It's called Key Summit because it forms a watershed for three major river systems.