The Holt tractor factory (See above post) surrounded the Church Street and Aurora Street intersection in Stockton, California
https://calisphere.org/item/ee04cc22...58f14962f45e6/
The old factory site is now mostly a post industrial waste land, and as Whulsey can tell you it is not a good idea to go wandering around Central California towns unless you fully understand the area and its risks very well.
The only remaining buildings from the Holt days are the company fire engine house, on the west side of Aurora Street, mid way between Church and Hazeltine.
https://www.google.com/maps/@37.9491...7i16384!8i8192
It is now in falling down condition, when I lived in Stockton almost 30 years ago, the building was still being kept up.
The back brick walls of the Hixco warehouse on the SE corner of Hazeltine and Aurora might be from a Holt building.
https://www.google.com/maps/place/E+...4d-121.2780326
The imposing Holt company offices on Church Street are long gone. They are in the background of the picture showing the Holt " minitank " and General Swinton.
https://s7d2.scene7.com/is/image/Cat...28-54364-29167
Benjamin Holt's house was located a few blocks away from his factory, close enough so that he could walk to it (he was very frugal) and make sure that everything was going well. The building had been used as an attorney's office and a half way house.
https://en.wikipedia.org/wiki/Benjamin_Holt_House
Holt eventually merged with Best to create the Caterpillar Company. For many years, Holt and Best had been bitter rivals engaged in patent infringement law suites.
For what it is worth, there was a junk yard in south central Stockton that had a mammoth heap of old tires. The tires were hauled away in the early 1970's revealing a long forgotten 3 truck Shay locomotive.
https://sierraloggingmuseum.org/shay...y-of-ysl-no-4/
PS
A video of large holt machines and a few shots of the Stockton Holt factory
https://www.youtube.com/watch?v=hEFktbuYuXw