First of all, it only costs like $5 to get in. It is hand made by a man in the 50's (I think) and is a really cool place to go and see. HE has the tiny spiral staircases and a dungeon. There is a huge terraced garden with some of the most beautiful plants and flowers ever. The man who built it went all over the United States and got rocks to use in the outer shell of the castle. They have the initials of the state carver onto them so you know where they came from.
My grandparents lived in Dayton and would take me down tot the castle quite often. I hadn't been back in YEARS and my husband and I decided to go take the kids on our way to King's Island last summer. So it is kind of a tradition for me.
My picture of my kids was taken there also! Go to the castle and enjoy yourself! It is a great fun place to go.