There's really nothing mystical about nitrous oxide and the application for automotive engines. Very simply NOS made it better and safer for customer use. The following questions and answers are typical of those fielded by NOS R&D people and we hope that they will be of help to all of those who seek the winning edge.
Posts: 738. As posted above, you can only get to Aguas Calientes (Machu Picchu Town) by train, and you need to fly into CUZ. To speed things up, you could take a taxi directly from the airport as far as Ollantaytambo, from where there are more trains to Aguas Calientes - which from Ollanta is only about an hour away.
If you want to hike your way to Machu Picchu, you must do it with a tour. However, it is also entirely possible (and quite easy) to visit Machu Picchu on your own, tour-free. This can either be done as a day trip from Cusco or by staying overnight in a neighbouring town and taking a bus or walking up to the ruins.