I've built this as a side project last month. I know there are a few similar sites out there, but I've found them cumbersome to navigate with ads that slow down the experience.
So I decided to take a stab at it and build my own version, with a minimalist UI (+ I implemented a custom right-click menu to enable navigation even when the UI is hidden), ad-free, just for fun.
There are over 130+ cities that you can explore right now, but I'm constantly adding new ones.