Originally inspired by the initial encounter in Rise of the Runelords where goblins attack the cathedral ceremony, I made a very large (157MB) battle mat for an encounter in my campaign. It prints out at a total of 4 x 4 sheets of Letter sized paper. Here is a small sample of that map.
PS- This is still a sizable image. Over 7mb. Just warning you.
ravenbow 
Hello! Wonderful map (Dundjinni?) and was just wondering if you could make the rest of it available? I am just getting ready to begin Rise of the RUne Lords and would love to print out the full map and glue down on foam core to really wow my players!
Thanks in advance!
Cheers!
-John Guild