climbing robot - http://www.newscientist.com/blog/technology/2006/03/tree-climbing-robot.html
My favorite type of robots are the kind which mimic animal behaviours. Of these, i find that RobotSnakes look the most poetic.
http://www.techeblog.com/index.php/tech-gadget/acm-r5-amphibious-snake-like-robot
http://www.snakerobots.com/