Ciudad Perdida (the "Lost City") is a ruined settlement deep in the Sierra Nevada de Santa Marta, built by the Tairona people around 800 AD — some 650 years before Machu Picchu. It was abandoned during the Spanish conquest and not rediscovered until 1972, when tomb raiders stumbled upon its terraces in the jungle.
Reaching it requires a four-to-six-day guided trek through dense tropical forest from the trailhead near Machete Pelao, southeast of Santa Marta. The trail climbs through river crossings, indigenous Kogui and Wiwa communities, and increasingly thick jungle before the final ascent up 1,200 stone steps to the terraced city at around 1,300 metres. It is one of Colombia's most rewarding and physically demanding adventures.
All treks must be done with a licensed operator — independent visits are not permitted. The trail was reopened after years of security concerns and is now considered safe, though the hike itself is challenging in the heat and humidity.