What are good careers for single men that offer both National and international travel?

Good Morning Fellow Men,

I have been out of the military for over a year and even though I appreciate the freedoms I now have, I really do miss the travel I used to experience.

What are some careers in the civilian (or govt.) sector that require a lot of travel but when you get to your work destination you are given decent leisure time and can actually enjoy the local things of the area? TIA