Re: what is Unesco?
I have to assume you don't know Wikipedia.org either.
As for status, they have as much as countries give them and according to some Americans too much.
A list of World Heritage sites in the USA you find here:
https://en.wikipedia.org/wiki/List_of_World_Heritage_Sites_in_the_United_States
As far as I can remember some Americans have opposed some of the new sites added to the list because it prevents them from exploiting them economically. In case Obama is in some way involved I have a feeling I can guess who is behind this change. and why, but I would need an American to add the numbers. An example of the status they have, is for instance. that say McDonald's is not allowed to hang their name on the Statue of Liberty.