"One of my favorite pieces of art is Le Palais ideal by Ferdinand Cheval. https://en.wikipedia.org/wiki/Ferdinand_Cheval He was a French postman in the 19th century who walked the same, daily, 10-mile route delivering mail. One day, at age 43, he tripped over an interesting rock, which he carried back with him and used it to begin building a structure. For the next 33 years he picked up stones on his route, and at night (by oil lamp) and on weekends built his ‘ideal palace,’ 100 feet long and 30 feet high, with animals, figures, spirals that often have a Pacific or African feel to them (though he had never traveled). It is a stunning work from someone who has no training or contact with the art world, but made up for it with time, determination, and imagination. Spending a few hours in and around his palace was one of the best art experiences I have ever had." William Blomstedt
Images from Google of Le Palais ideal
Le Palais ideal - Atlas Obscura