The umarked castle

Once I had a daughter called Anna. She was the sweetest daughter I could ever have and she was perfect in everyway, and I mean that literally as she never sinned or was rude to anyone.
Plus she always got an A in her exams, but my wife left me a few months later with my daughter and I never saw them again.
I prayed to get my daughter back someday and then I received an anonymous letter telling me the following:
Follow these instructions to find your daughter. Step 1- drive to the middle of the forest. Step 2- get out of the car and walk counter clockwise around it with your eyes closed; turn 10 times. Step 3- think about your daughter and finally you will see a castle. See ya there!
I was wondering how this person found my email so I did my best to change all my passwords and put two-step verifications on most of my accounts.
Then I grabbed a pistol and a knife and followed the weird instructions. Somehow a huge castle did indeed appear. It was made out of gold and silver but it was rotting away, and the windows depicted violence and wars that I never heard of before.
The front door was 10 feet tall as well as the windows. I decided to run inside without looking and two red armored knights blocked my way.
They told me to buzz off. I unmasked one of them in anger, and it ended up that what was inside was a mix of a hyena and a demon as it had red glowing eyes and spike-like horns.
That made me jump and scream as I pretended to go back into my car and that fooled them as they let their guard down.
I was able to shoot one in the face and it seemed to have died, so I ran to a nearby window and crushed it.
The inside was beautiful and filled with antiques which made me wonder how it stayed this way.