It wouldn't be that weird: quite a lot of users want to learn the language because they have a vacation planned, and so they want to learn tourist words.
However, words like airport, school, hotel, and church are actually taught before amusement park.
Some words are grouped thematically, so hospital is taught in the medical skill, which comes later. I honestly agree that one could be moved up a bit.
I wrote a bit about that here: https://forum.duolingo.com/comment/26420394/Answers-to-some-common-questions-on-grammar-that-beginners-have
The simple answer is that you need three definites if there's an adjective describing the noun.