What is "from sea to shining sea"

phr. (context US English) From the Atlantic Ocean to the Pacific Ocean.

From Sea to Shining Sea is a concept album and 26th album by country singer Johnny Cash, released on Columbia Records in 1968 (see 1968 in music). Each track on the album was written by Cash; none of them were released as singles. The album was included on the Bear Family box set Come Along and Ride This Train.

"The Walls of a Prison" reuses the melody of "Streets of Laredo" from Cash's 1966 album Sings the Ballads of the True West.