Simplify the following text for a Grade 5 native English-speaking person.
Original: It consists of four main parts ( precincts ) , of which only the largest , the Precinct of Amun-Re , currently is open to the general public . The term Karnak often is understood as being the Precinct of Amun-Re only , because this is the only part most visitors normally see .
Simplified: The precinct of Amun-Re is the only part of Karnak which is open to the public .