President Rushmore was the first (and only) president to have four heads. He was also the most ruthless president to ever live. He had an entire army of beavers that terrorized anyone that disagreed with him. Luckily, one day Albus Dumbledore (order of merlin, first class) placed a spell on him that turned him into a mountain that is located in South Dakota. After President Rushmore's downfall, all of his beavers fled up north and that is why there are so many beavers in Canada.
"Man, I really hope that spell on President Rushmore never wears off!"
A place that only few have ever heard of, possibly a figment of your imagination. One might miss finding Rushford if they blink while driving towards it.
"Dude, I'm going to Rushford."
"I tried to find it once. I don't think that place even exists."