(above: blackpool boulder wall)
Yesh, they are real and existing. Some examples of boulder walls which are public domains of the urban climber. The best example I have found so far exeeds my imagination. Specially because the rock was 'simply' lifted from it's surroundings and transported to it's destination !! That's something we Dutchies dream of !! No reel rock to be found here, but hey ! let's go to Belgium and buy some rock to be placed in a park somewhere (preferably the Vondelpark in Amsterdam ;P). Anyway check the site of the Shoreditchboulder and see for yourself. (pic directly below: shoreditch, 2nd pic: ?, 3rd pic: wall-wanaka-lge New Zealand).