What is "unclimbed"

Usage examples of "unclimbed".

There was Mallory, who before the war had been a mountaineer, world-famous for his Himalayan exploits, and conqueror of most of the unclimbed peaks in the Southern Alps of his native New Zealand.

It is only with very few, as with Homer and Shakespeare at their best, the Venus of Milo, the Ilyssus, the finest work of Rembrandt, Giorgione, and Velasquez, and in music with Handel, that I can see no step left unclimbed, yet none taken on the downward path.