"Nobel: Available with Democracy: Gives every tech discovered a 10% chance to generate a free scientist in your capital~~~OR Every few turns the world votes and the winner gets money and a boost to current reasearch project"
...Democracy? What about the Nobel Prize requires democracy? The voting system is a bad idea, that would make it completely worthless to anyone who isn't eligible to be most loved, and the UN/AP give enough bonus for that.
I think scientific method deserves much more "pop" in the game... as it is it often pays to delay it because of all the things it obsoletes, and it doesn't open anything up. The Nobel Prize is a perfect choice, in my opinion, because it A) obviously is a way of rewarding/encouraging great people, and B) comes with the tech that eliminates the Parthenon.
Giving away a prize intermittently might be an okay alternative, but it shouldn't be limited to scientists. You can get a Nobel Prize for economics (Merchant), Peace (Prophet), and Literature (Artist) too. The only one that isn't really covered is spy.
There's no real reason for the Chunnel or Golden Gate to be on the map and not a wonder... the Great Wall is obviously "outside" a city, as are several others.
I suppose you're right about Petra, TheLastOne.