Remembering History: The Grand Canyon Diorama, which is featured along the scenic route of the Disneyland Railroad, is the longest diorama in the world -- it's 306 feet long and 34 feet tall and covered in 300 gallons of paint. - 12 Things You Didnt Know About Disneylands Main Street U.S.A.

The Grand Canyon Diorama, which is featured along the scenic route of the Disneyland Railroad, is the longest diorama in the world -- it's 306 feet long and 34 feet tall and covered in 300 gallons of paint. - 12 Things You Didnt Know About Disneylands Main Street U.S.A.

The Grand Canyon Diorama, which is featured along the scenic route of the Disneyland Railroad, is the longest diorama in the world -- it's 306 feet long and 34 feet tall and covered in 300 gallons of paint. - 12 Things You Didnt Know About Disneylands Main Street U.S.A.