Volunteering In Louisville

I would like to volunteer as a nurse in Louisville. I have a full time job but would like to get out and help the community with my skills a few times a month. I am an ICU nurse so I would love to branch out and do something different. I am very interested in women's health I looked on line but I didn't find anything.
Can anybody set me in the right direction.
Also one day down the line I would like to take a volunteer trip to south America for a week or two. Does anybody know of any good organizations?