It's the shopping centres. Anywhere in the world, the shopping centres look the same. it's a bit depressing.
Although the dockland regenerations are similar as well, but they're the same all voer the world too.

Cardiff is teeny compared to Melbourne, but I did the centre of Melbourne on foot more than Cardiff, because it was more joined up. I almost always get a bus from the centre to the Bay (unless I'm drunk, in which case all bets are off)