How many place have you been travel to? Won’t you afraid that you have any problem in that place? Understand where you were check-ins is very important as it can help you to track all your activities in Facebook.
By login into your profile Facebook page, then go to the top bar of your profile then click on it
Or on the address bar of your browser, type “https://www.facebook.com/me” then click Enter on your computer keyboard or go
After that it will link to your Facebook Profile Page, while you are on the profile page, please go to More tab, the click the under narrow. Click on the Check-Ins
Then you will see all the places where were checked in before: