Things like the national park should get a point.
Other things should get less or none.
I do in general think that era points are too easy to come by. I don't think chaining golden ages should be a thing. One to two golden ages per game or for the better players stretching to three should be what we get per game.
There's a balance to be made. The feature is designed so that it's something the players have to play with every era, and that's lost if you can only really get one or two a game.
From my experience, and from what I've seen in threads with people missing out by one or two points, Era Score isn't trivial quite yet, particularly in larger empires.