Deep in the Peruvian Amazon, Roberto Serrini uncovers a smorgasbord of psychedelic frogs, research fanatics and a surprising array of creature comforts.
The ruins here rival Machu Picchu as it was the last bastion for the Inca and perhaps one of the last destinations tourists have infiltrated.
Very few have caught wind of Machu Picchu's sister city, Choquequirao.