Thanks for your advice. If I had the time, I would do that. But realistically, I cannot do that as I don't have the option of taking more leave from work, and could only really take my time when I am retired and my elderly parents are no longer require caring for (perhaps in 30+ years' time). It is fortunate enough for me that I am able to travel at all. Most of the people I see at work are barely able to provide a subsistence existence to their families, never mind vacations.
I am fortunate that I can take in a lot of information in a short time and I read up on what I visit in a fair bit of detail. I intend to savour and marvel at every second of it.