You playing KSP and you munar lander is orbiting and ready to land on Mun. Where to land? Did I already land at the East crater or not. Instead of switching back to the space center and checking, just take a quick glance at this handy dandy paper checklist of all the biomes in the whole Kerbin system.
(Thanks to http://wiki.kerbalspaceprogram.com/wiki/Main_Page for the list of all the biomes)