The damaged railway line linking the citadel to the rest of Peru was repaired with an urgency rarely seen before, the BBC's Dan Collyns in Peru says.
For all its other tourist attractions, Peru has had a tough lesson in just how central Machu Picchu is to its tourist industry, our correspondent says.
"This incident with the train to Machu Picchu has definitely had an impact on us I would say our sales have been reduced by 50%," said Bernard Schleien, director of the Latin America For Less travel agency.
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