[xmonad] Virtual desktops?

Dear all, I am rather new to Xmonad (loving it though!), so sorry if this question has an obvious solution. I am very used to working with virtual desktops in conventional WMs, and its an important part of my workflow. I was wondering if I can do the same thing in Xmonad? What I want is to be able to specify a number of such virtual desktops (or virtual monitors if you like), and then easily switch between them using some keybinding (preferably one I can mod myself). Thanks in advance! Best, Chris