I’m scheduled to take the Hidden Galapagos & Peru trip in May. For those who have been how difficult/strenuous are the steps at Machu Picchu? I understand there are very few handrails - can you touch the walls as you go up or down the steps? Are the steps tall steps like sometimes the first step getting on a bus or are they generally like the kind you have in your house? I’m a little nervous about the steps at that elevation (I live area level) so any perspective you can give would be greatly appreciated.