The clue in the Nazca Lines reads: "Travel to where the Incas were born." Time to head into Bolivian territory to what highest navigable lake on Earth?
Answer Lake Titicaca
The Incas were born at Isla del Sol, an island on Lake Titicaca. In fact, according to legend, it was on the Roca Sagrada (sacred rock) that the first Incas came to be.
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