Im really interested in factories, large factories tend to be located with access to many modes of transportation.
oh yea? well can you tell me a bit about them
Yeah factories have access to rail, highway, and even water loading and unloading facilities.
oh wow i didnt know that
The rail friend transport is really interesting to transport cargo cheaply, considering people think railroads are a thing of the past.
oh cool, what else?
, chemical reactors, pumps and piping – outdoors and operated from control rooms. Oil refineries have most of their equipment outdoors.
Discrete products may be final consumer goods, or parts and sub-assemblies which are made into final products elsewhere. Factories may be supplied parts from elsewhere or make them from raw materials. Continuous production industries typically use heat or electricity to transform streams of raw materials into finished products.
The term "mill" originally referred to the milling of grain, which usually used natural resources such as
workshops".
Most modern factories have large warehouses or warehouse-like facilities that contain heavy equipment used for assembly line production. Large factories tend to be located with access to multiple modes of transportation, with some having rail, highway and water loading and unloading facilities. 
Factories may either make discrete products or some type of material continuously produced such as chemicals, pulp and paper, or refined oil products. Factories manufacturing chemicals are often called "plants" and may have most of their equipment – tanks, pressure vessels