One Christmas when I was in high school, I received what I thought at the time was an odd gift - a personal safety alarm. I thanked my parents, but wondered why they thought I needed personal protection. As it turns out I never used the alarm but I sure felt safer when I was walking home in the dark.
To protect your person when traveling, there are a variety personal safety options. Actual weapons of course, which I don't recommend - studies have proven you're more likely to get hurt carrying your own weapon. Pepper spray or mace, which you would spray in an attacker's face, or a personal alarm which usually includes a pull string or a button to push and makes a very loud and distinct noise.
If you are going to purchase a personal safety product for your travels, here are a few things to think about. Check if personal defense products like pepper spray and mace are illegal where you're visiting. Make sure that you have extra batteries for your personal alarm and check them every so often. The last thing you need is to activate the personal alarm and nothing happens.
Another thing to consider if you're going to carry mace or pepper spray as personal safety product - they inflict real pain. So protect yourself with a personal defense product but make sure it's for a good reason.