Below are four interesting maps I found recently. These inspired me. Here are some maps I've always wanted to make:
For those who want to go deeper, check out the MapPorn subreddit.
Twin Peaks by David Lynch
http://www.austinkleon.com/2008/05/21/maps-of-fictional-worlds/
http://blogs.guardian.co.uk/culturevulture/archives/2006/02/03/going_underground.html
http://bigthink.com/strange-maps/579-a-1939-map-of-physics