Mobile homes.

Also known as camper vans. 

There are two roads to how these vehicles came about.

1. Travelling communities across the world, Circus's, Showmen, (Fun Fairs/Fairground attractions), moved from their horse drawn waggon's and houses to the steam engines and then on to the motorised versions.

2. The 1920's saw the rise in Caravaning craze in the UK and after World-War-II (1939-45), the Camper van came in to an easy tourer. 

In the 1960's the German Volks Wagen VW camper was associated with the 'Hippie movement and Woodstock'.

It became the iconic vehicle of young people travelling around and it remains so to this day in Europe anyway.

 

Today there are quite a varied selection of vehicles on the market. In the U.S. the Winnebago is probably the largest mobile home. Many people have over the years converted trucks and buses, coaches to live in.