They may not be relevant to your work, but when I look at a CV and see nothing I think "that person is a boring twat, do I really want to potentially end up working with him/her?". Harsh I know, but when faced with 20 or 30 cvs, you have to have some criteria to whittle them. If someone plays a team sport it illustrates discipline and the ability to be a team player for example. If someone has travelling down then I know that they are open minded, most likely would be willing/want to travel for work, and are possibly used to dealing with different cultures.
But without a doubt the most ridiculous thing I have seen is under personal achievements: "I can finish a rubics cube". I shit you not!!