Maps are an AMAZING way to wrap yourself around a complex project.
Choose a place! It could be anywhere - Thailand, Wyoming, California, Malaysia, Iceland, wherever!
1.) Start by developing a color key. Work with three to five colors. My map is Florida, so I'm going to go with the white sand, aquamarine like you find painted on lifeguard seats, white-grey shell colored sand like bleached coral, and for green I'll go with a ruddy palm leaning toward yellow and brown (I'll want to add a bit of red and orange to any saturated green mix).
2.) Work on locations that are of interest to you - perhaps places you've visited. Investigate the wild-life and flora. Florida? I've got to get a starfish in there, some jellies, palms, little coconuts, and those turquoise blue beaches. The Florida keys and Everglades are going on there, and so is Miami.
3.) Decide on media. And fashion a key. You can go for the tissue paper, watercolor, or sculpt little three-dimensional figures to attach.
4.) Display it, and share your map with others.