So they landed on the other side of the sea in the region of Gerasa.

They landed in the neighborhood of Gerasa, which is just across the lake from Galilee.

Then all the inhabitants of the country around Gerasa asked Him to go away from them, because they were terribly frightened. So He got into a boat and went back.

"Return to your house and tell people about the great things God has done for you." So, he went on his way, proclaiming throughout the whole town [i.e., Gerasa. See verse 26] the great things Jesus had done for him.