An office in the Edificio Rex on Carrera 3, three blocks from the seafront, selling the two things Santa Marta is a base for: the four-day walk up the Buritaca to Teyuna, and the long drive north into the Guajira desert to Cabo de la Vela and Punta Gallinas.
The four-day Ciudad Perdida trek is COP 1,860,000, which is the same price every authorised operator quotes — the competition here is about food, the state of the hammocks and whether mules are included, not about money. They take a 7% deposit to hold a place.
Open every day, 08:00 to 18:00, with a second office in Riohacha for the Guajira end of the business. RNT 30274, and they print it, which is not universal.