A great way to travel and experience the world, while changing the world for the better and changing yourself, is a mission trip. It's best to go along with a group from your church or go along with a ministry that has work lined up in the destination.
It can be difficult to research for a mission trip because the places you go are usually not tourist areas. You are going to places deep in poverty to serve them and try to share Gods love with them. When you go with an organized group they will have local contacts and know where to go and what to do to best serve the local community.
Before you go on a mission trip it is wise to do the following:
When you go remember that you are there to serve people and help people and just love your neighbor.