Complex sentence: The alternative way was from Peruvian port Mollendo (Querejazu: Moliendo) per railroad to Puno then by boat service to Chichilaya, at the Bolivian shore of Lake Titicaca.
Split into simpler sentences: The alternative way was from Peruvian port Mollendo (Querejazu: Moliendo) per railroad to Puno. Then per boat service to Chichilaya, at the Bolivian shore of Lake Titicaca.