What to do when traveling on holiday?

Hi - I have many holidays due and will be required to take some soon. I will have to travel alone and would like some interesting, 'different' ideas to do.
Would be interested in working with animals, volunteer work, dangerous - something out of the ordinary- basically an Experience.

Any ideas welcome..Thanks

I just gave someone a good answer on volunteer opportunities in San Francisco, CA. Have you ever been? It's a beautiful city with lots of volunteer opportunities.

The thread is here, if you're interested:

http://www.funadvice.com/q/recommend_volunteer_work_in_san_francisco