Castle Rock may refer to: Geography. Islands. Castle Rock (Alaska), an island off the coast of the U.S. state of Alaska. Castle Rock, Hong Kong, an island of Hong Kong, part of the Po Toi Islands. Castle Rock (Massachusetts), an island in the U.S. state of Massachusetts. Mountains and rock outcroppings. Castle Rock (Antarctica), near McMurdo Station, Antarctica. Castle Rock (South Shetland Islands), Antarctica. Castle Rock, Western Australia, in the Porongurup Range, Australia. Castle Rock (volcano), a volcanic plug in British Columbia, Canada.
https://en.wikipedia.org/wiki/Castle_Rock