I also think that most of the wonders are way too cheap... especially if you "buy" them, it is possible to get many wonders in the turn you researched the tech since you have too much gold in the modern era and beyond... Maybe the "+X% speed with [resource]" should be changed to "requires [resource]".
Speaking of the gold-problem, I think the random events should be rescaled. I saw the Monte Carlo events in this thread which gave you around 600 gold. Thats not that much in modern eras... same as the 50 gold for the wool sales
Next point is the dinosaur park. You do not really NEED the DNA from dinosaurs. You just need to know the SEQUENCE. With improved knowledge of Genetics and all the pathways that regulate the biochemical processes of a cell, with comperasons to known species (birds, reptiles...) and advanced computers it should be possible to design a DNA which may not be the same as the original dinosaur DNA, but leads to an animal with the same appearance and behaviour. So I would changes the requirements to cloning, cloning factories, cloning laboratories, advanched computers and maybe a new tech called advanched genetic engineering or something like this (I think if you already have advanched computers, molekular biologie is a bit out of date).
The main reason to put this park earlier in the techtree is, that you dont really need a dinoaur park, if you may offer you people vacations in the past via timetravel

Even if the timetravel is only for very rich people payable, no-one sees a dinosaur-park as a worldwonder at this time...
But the dinosaur park lead to another idea: What about an alien-park? I dont talk about intelligent aliens, there should be some planets with lower lifeforms, too.
And the last thing: I love your wonders! Great job!