By train
By train
If the nearby salt plains appeal, take the 3 or 4 day train ride to Bolivia bring warm clothes!. The amazing train is essentially a cargo train that carries a handful of Bolivian peasants between the coast and the altiplano, but it provides an incredible vista.
The train to Bolivia used to run 2 times a week.
As of June 2009, the train service stopped running to Ollague. However, there there are bus services to Ollague the Chilean-Bolivian border for around 4,000 Pesos. Try the bus service 'Frontera Norte'
Edited info: This train service has stpped. There are no trains from Bolivia to Calama Chile. The FCA website takes you to train service from Lima to Huamcayo in Peru.