When I was visiting Malta, I had a chance to visit a few Megalithic temples.
Each site was very interesting. Everywhere, I met friendly people, proud of their culture and place they work. I also liked the way some Megalithic temples (not all of them) are protected, e.g., with a “tent”.
And in general, it’s a very unique experience to be in such an old place, even if their age is not so precisely estimated, they are still impressive!