Also don't think the Brazilian parts of the border are any safer than the Peruvian ones. Cartels export cocaine to Europe using Brazilian and Argentine ports. Both sides of the frontier are controlled by gangs from their respective countries, they would NOT appreciate a rando fucking around seeing what's going on.
Many isolated areas in Latin America are like that. Colombia is the world's largest producer of emeralds. There are parts of the country where people literally stumble on gold in the ground. The Clan del Golfo sends armed bands to take over mines, regardless of who owns the rights to the land. They fight off the police with mortars and heavy machine guns.
Driving through the countryside, there are places where it feels too quiet, where you can feel the tension in the air. Villages near strategic areas have sinister fucking people beneath the surface. Santeria is practiced in Colombia due to the African legacy near the coast. Criminal gangs make offerings to the devil in exchange for protection, and to hurt their enemies. The last thing I'd describe Colombians as is gullible, but most of them seem to believe in it. Self-described witches are respected and feared. No Gwyneth Paltrow crystal ball shit.
This is a place where even in the city, people constantly flout the rule of law. In the country, once you get into trouble, there's nothing or no one that can help you. Green hills as far as the eye can see, without a soul to be found. But there are bodies underneath.