No big rock on the cat ranch or any of the neighboring farms. We have a 4ft tall stone pillar with our last name on it by the driveway but that was done professionally. Most of the big operations have a huge billboard type sign that says "Smith Family Farms -Established 1898" with farming type art in the background.
One neighbor does have an old 1940's rusted pickup out front with flowers planted where the engine was and in the bed, that looks pretty cool.