And the Trevi Fountain does look exactly like the pictures. It’s just that the famous photos were probably taken at 6 am or something like that when nobody else was there.
As far as the fountain being kind of crammed into its square, that’s a general Europe thing to have stuff like that just there without any sort of surrounding plaza, etc. especially in Rome/Italy. I was shocked to go into the Louvre, and see the Venus de Milo just out in the middle of a hallway among the rest of the artworks. I had sort of expected a more American treatment, where it would have its own little room, etc… Same thing for a lot of the Renaissance masters’ works that I saw in Italy- they might be in a museum, but they might also just be on the wall of some unremarkable church where they were originally put in 1599.
We visited Avebury on my graduate school study-abroad summer, and it was fantastic. It’s roughly the same age as Stonehenge, but is a LOT larger- the outer circle is hundreds of meters in diameter, and the dikes/ditches are still quite prominent. I highly recommend it.
In a larger sense, I don’t really understand the mentality of going somewhere, and just wanting to get your own version of the famous picture. You’ve already got that; you’re going wherever it is to actually explore it and see it firsthand, not just get a touristy shot of something that’s been photographed from that angle a few million times already.
And griping about weather is just silly. That’s out of anyone’s control, and it’s unreasonable to have expectations about it, other than in the broadest strokes (i.e. if you’re going to Alaska in the winter, you can expect it to be cold)
For me (and I realize I may be different than most), a huge part of the fun of travel is the discovery of the unexpected- that may be bad weather, strange settings for famous things, or whatever. It’s not about checking off things on a card or getting pretty selfies for the 'Gram or whatever.
That said, I do understand the idea of not wanting to be among the tourist hordes. I’ve had great luck going in the off-season (winter). In some cases it’s better weather, in others it’s fewer tourists. Death Valley in February is quite pleasant, for example. Rome in December is not packed to the gills with tourists, nor is it uncomfortable. (oddly Prague has a LOT of tourists around NYE).