The referenced "Snake Farm" is along the I-35 freeway between New Braunfels, Texas and San Marcos, Texas (Go Bobcats!).
As other sources note it began operations around 1967.
Basically it was from the late sixties through the eighties a snake and reptile house, with a few other oddities mixed in.
Today (2016) the Snake Farm is under new management and is a small but nice family oriented private zoo, so please stop in if you are ever passing by.
Now the following comes from my experience as a child in the early seventies.
On about two or three occasions, I happened to visit with my family, or once with a summer camp, the Snake Farm.
At the time it was a dingy privately run reptile house, with some large snakes, a few other reptiles (maybe a gator, but I am fuzzy on that point).
If you went out back of the main building at the time to see the larger animals exhibited there, you would notice a number of ramshackle mobile homes lining the back of the property.
Never saw any activity, but it was odd.
In my college years, I attended SWT in San Marcos.
Both the Snake Farm and SWT reside in Hays County, Texas.
It was then that I first heard rumors of the Snake Farm's other purpose.
The farm part was a front for a prostitution operation run out of the trailers at the back of the Snake Farm property.
The activity was supposedly sanctioned by the sheriffs(s) of Hays County, who I imagine got a cut of the action (or so I am told).
Often, women of "ill repute" and questionable morals were taken there by the sheriff of Hays County to work off the debt they owed to the court/county.
While I never knew anyone to utilize the clandestine facilities of the "Snake Farm", long-time residents of the county relayed much of what I know to me about the "Snake Farm" history.
Take what I relay for what it is, second and third hand rumor or legend.