At the Crossroad of Mountains September 11, 2013 · Phutuq K’usi · Phutuqk’usi · Putucusi · Aguas Calientes · Perú. Nikon D800 · Sigma 35mm f/1.4 DG HSM | Art · 1/400 sec @ f/5.6 · ISO 125 View of Aguas Calientes from the Inca Trail to Phutuq K’usi (or Phutuqk’usi, in Quechua, Putucusi in Spanish).