A park spokeswoman said there was no choice but to remove the plaques from three popular spots at the canyon's busy South Rim after an inquiry made by the Arizona chapter of the American Civil Liberties Union.
"They are religious plaques on federal buildings and that's not allowed based on the law," said Maureen Oltrogge, a Grand Canyon National Park spokeswoman.
The plaques are inscribed with passages from the Book of Psalms, specifically, by chapter and verse 68:4, 66:4 and 104.24. The last verse, in the King James Version of the Bible, reads: "O Lord, how manifold are thy works! in wisdom hast thou made them all: the earth is full of thy riches."