MapCrunch is described as 'Random Google Street View'. There are seven alternatives to MapCrunch, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Self-Hosted solutions. The best alternative is GeoGuessr, which is free. Other great sites and apps similar to MapCrunch are Kartaview (formerly OpenStreetCam) (Free, Open Source), City Guesser (Free), GeoGuess (Free, Open Source) and Geotastic (Free).
This is Kartaview.org Kartaview is a free and open platform for street level imagery. Anyone can contribute images with a smartphone and the open source apps. Common open source code : https://github.com/kartaview
Geoguess is a free OpenSource game with Google Map StreetView inspired by GeoGuessr. When you start a round, you are teleport to a random position on Google Street View. Move and observe the vicinity. Try to guess where you are.