The ancient civilization of Kush (also known as Nubia) was bordered by the following major landforms:

East:

* The Red Sea: This vast body of water formed the eastern boundary of Kush.

West:

* The Libyan Desert: This vast, arid desert stretched westward from the Nile River, forming a natural barrier.

Note:

* Kush was primarily located along the Nile River, extending south from Egypt.

* The landforms mentioned above were significant in shaping Kush's geography, environment, and history.