Monke
So… in the novel… it IS actually a different planet and obviously the Statue of Liberty is not there.
You likely already know this but the statue in the movie is a convenient symbol for change over time which is relevant to the book. No spoilers.
Anyway… read the novel! It’s great.
A wizard did it.
It’s actually still earth and the protagonist time travelled.
They travelled to the past when only the upper half of the statue was built.