From Santa Marta of Palomino, you take the bus towards Guachaca. Get off at the 'entrada de Ciudad Perdida' (the entrance to the lost city), where you take a moto-taxi up to the hostel. This ride takes about an hour and costs $45.000. If you are on a budget, you could take a moto taxi up to Machete for $25.000 and hike for about an 1,5 hours to the hostel.