Quelccaya is the largest ice cap in the tropics. Its also contracting by more than 600 ft a year and experts estimate that it will be gone by 2100. With it shrinking at that rate, its worth jumping in there sooner rather than later.
Ayni-Peru, famous for their Inca Trail treks, now offer guide led expeditions to the glacier from Cusco. Its only a short three day expedition, but it is fairly challenging thanks to the terrain youll be covering and the altitude.
It is worth it though. The views of the surrounding mountains and glaciers are beautiful, you can get a good look at the ice shelves and will pass grazing llamas, alpacas and other wonderful Peruvian mountain wildlife that are all fed from the fruits of the Quelccya ice cap.