Best views of the mountains and three lakes "Tres Lagunas".
Touching the void
There is an alternative shorter start saving a day and half by going by bus further to Pocpa and walking by road through Pallca to Matacancha camp site.
At the time we had to hire a cab for the last part, but now the bus goes right from Lima to Llamac (1.5 h, 15 soles) from Chiquián.
Cabs in Peru were ubiquituous and cheap.