City Guesser is a pretty fun website, it gives you a walking around video of a random city and you have to guess where it is. It’s superior to Google Street View for exploring someplace because you can hear the crazy homeless people shouting in a back alley you pass by, so it’s almost like you’re really there. I recommend putting headphones on for full immersion.
It’s got trophies and multiplayer mode and stuff but I’m honestly just using it to remember what it was like to walk on a crowded street so I don’t care about the points or whatever it is.