Dalmanutha refers to a place that was mentioned in the Bible. It's not a very well-known place because it is only mentioned once in the Bible in the book of Mark. We don't know exactly where Dalmanutha is or was, but it is believed to be near the Sea of Galilee in Israel.
Now, let's imagine you have a toy box with lots of toys in it. You always keep it organized and you know where everything is supposed to be. But one day, you notice that a toy that you don't usually play with is missing from the toy box. You know you didn't lose it, so you think maybe someone took it out and put it somewhere else.
That's kind of what happened with Dalmanutha. It was a place that was mentioned in the Bible, but we don't know much about it because it was only mentioned once. It's like it was there for one moment, and then disappeared. But even though we don't know much about Dalmanutha, it's still interesting to think about and wonder what it was like.