The route from the mountain village of Machete Pelao to the Ciudad Perdida – the Lost City – is a four-day hike through dense jungle. Early treasure hunters who fought their way to the site, Teyuna, the ancient Tayrona city in the Sierra Nevada, cursed it as a “green hell” beset with snakes, mosquitoes carrying Yellow Fever, scorpions and jaguars. It’s only around 25 kilometres but the journey is arduous, along muddy paths through subtropical forest, with wobbly rope bridges and mountain streams. “Tiring, yes, but it’s a blessing too,” says tour leader Marco Pollone. He says you can reach Peru…