You workspace is the right lower corner. Number 1 is this desktop what you see now, the empy box is new one. Every time you put something running in the empty workspace, it opens new empty for you.
I don't think you can actually yet see workspaces anywhere else in Cinnamon, than that lower panel corner. But I'm just six week newbie, so what I know is very limited.
Asus P7P55D, i5 750 2.6Ghz, 4GB DDR3, radeon 6540 (Gallium 0.4), 80GB Intel SSD, Dell 1920x1200, Dual boot, Linux Mint 14 Cinnamon, Windows 7