You really should have a look at
Sanitarium. It's a tad older than 2002, but still looks good and plays great. It has an intriguing plot, as weird as you can get, and good puzzles (though not too hard, which you may prefer if you enjoyed Syberia).
It doesn't have an amusement park though, but in
does have a carnival (on an island with dead bodies floating around it).
It's definitely one of my favourite games (in my personal top-10). I'm sure you'll enjoy it.
