Google Street View - With Street View you can explore the world at street level.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
GeoGuessr - GeoGuessr is a new way to explore the world in a gaming style.
Urban Jungle Street View - Explore the world through Google Street View: Jungle Mode
OpenStreetCam - OpenStreetCam that was also known as OpenStreetView, is a service dedicated to offering the real images of the most of the locations of the world.
Google NightWalk - An audio Streetview tour around Marseille