Collins Castle is the ruins of a castle located in Turner Falls Park in Davis Oklahoma.

Note that in doing research on this castle I have seen it referred to as both Collins castle and Collings Castle.

Technically the castle itself is free to explore. But, to get to it you have to pay an entrance fee into Turner Falls Park.

The Sign outside the castle ruins reads:

Based on Old English architecture the castle was constructed with
native stone and materials in the early 30's by Doctor Ellsworth Collins.
He was a professor at Oklahoma University.
The buildings served as the Bar "C" Ranch headquarters and for Dr. Collins Summer home.

There is a vantage point not far away. You drive up to it. And from there you can see the castle and Turner Falls. It is all located within a park.

You are free to walk around and explore the castle ruins. It's a small ruins nestled on the side of a hill and it is fun and easy to explore. Just be careful!

The Whole Turner Falls Park is really nice. I like it a lot. There's the falls, the castle ruins, the stream, camping, hiking and more. It's really nice. If you want to learn more about it here is their website.