In truth, it is actually only about one kilometre from north to south, and close to that east to west, though that is not very accurate due to the ovals. Believe me, I know - I walk it nearly everyday.
While there is quite an amount of concrete, as Sven182 states, the gardens and grass areas through out Curtin University provide an equilibrium and a great place for students to study or chat- weather permitting of course.

The student housing there is well set out. My own Erica Underwood House is one of the newest of the housing, accommodating 152 students in flats of 6 people.

I find it amusing that the author of the above writeup is from the University of Western Australia- Curtin's greatest rival.