When I was a student in college, I spent several summers teaching English overseas. My wife also spent several summers teaching English to Chinese medical students and physicians who wish to improve their verbal English skills. The demand for English teachers is very big in many countries. This is particularly true in Asian countries like Korea and China. If you'd like to explore some opportunities in teaching, then you may enjoy spending a few weeks teaching English to eager students.
There are many opportunities to offer private tutoring services English overseas. Looking for a way to create some supplemental income and travel? Forget about medical tourism. Consider teaching tourism!