It is possible to travel by river from Colombia and Brazil to Iquitos. A short passenger line continues from Huancayo to Huancavelica. The Southern Railroad runs between Arequipa to Lake Titicaca and Cuzco. Services are cheap, fairly comfortable, but not particularly safe. Fall asleep in the second-class part of a night train and you are almost certain to be robbed.
Boat travel is important in Peru's eastern lowlands.
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