Simplify the following text for a Grade 11 native English-speaking person.
Original: The major centres are Jabiru on the Kakadu National Park border , Maningrida at the Liverpool River mouth , and Nhulunbuy ( also known as Gove ) in the far north-east , on the Gove Peninsula .
Simplified: The major towns are Jabiru on the Kakadu National Park border , Maningrida on the Liverpool River mouth , and Nhulunbuy ( also known as Gove ) in the far north east , on the Gove Peninsula .