found this at unreal playground, a pretty nice map for large games. It's not the most mindblowing beauty of all time, but it's framerate is great for it's scale.
http://www.unrealplayground.com/download.php?mapid=3347
http://forums.unrealplayground.com/attachment.php?s=&postid=181713
http://forums.unrealplayground.com/attachment.php?s=&postid=181714
http://forums.unrealplayground.com/attachment.php?s=&postid=181717
http://www.unrealplayground.com/download.php?mapid=3347
http://forums.unrealplayground.com/attachment.php?s=&postid=181713
http://forums.unrealplayground.com/attachment.php?s=&postid=181714
http://forums.unrealplayground.com/attachment.php?s=&postid=181717