Hey, I am not sure if you are and Android or iOS user but if you have an Android you might want to try out Haveyoubeenhere. The iOS version is coming later. While it's mostly an app for travelers (and I created it as such), I have used it myself for one lf my urban exploring adventures too!
It's a seperate platform, but you can directly crosspost to Steem! Non Steemians can log in with Facebook first to get familiar with the platform too!