Sacsayhuamán puzzles me

Sacsayhuaman, archeological Inca site
© Peter Apers | Dreamstime Stock Photos

Despite the advice to take a rest when arriving at Cuzco by airplane because of the altitude (3400 meter), we immediatly went to Sacsayhuamán. It is an impressive archeological Inca site, a little bit above Cuzco. Although I have been there several times, the big carved stone walls remain a puzzle. How were these stones transported, how were they carved (they have many dimensions and there is no space to stick something between them), and how did they survive earthquakes?
While being puzzled I was thinking about taking pictures of a site that has been photographed so often. Here are some of the challenges. At this altitude the sun is really burning also in winter. Wearing a hat to keep your head cool is essential. Also take a lot of water. Walking around on these sites with heavy equipment in a burning sun takes a lot of energy. Furthermore, taking pictures during a tour with family and friends surrounded by other tourists limits the opportunities to extensively explore the sites. And, finally, at 18:00 hours the light goes out rather abruptly. At the same time, all these limitations stimulate creativity.
I was happy I had taken my 28-300mm zoomlens. Without changing lenses (I do not like to change lenses because of the dust in Peru), I could easily change from wide-angle to telezoom. During most of the time there was more than enough light to have a large depth of field without sacrificing the ISO.
Back home, while processing the pictures, I realized that the burning sun made the pictures look a bit bleak. With Lightroom I had to bring the colors I remembered back by adding some contrast,  vibrance, and saturation. Here are the results.