At the Minnesota Marine Art Museum in Winona, Minnesota, you'll find a painting that seems to go on forever.

It's called "The Grand Panorama of a Whaling Voyage 'Round the World." At 1,275 feet long, it's believed to be the longest painting in North America.

It's so big, it can only be shown one section at a time.

"So every 10 to 15 days or so, we advance the piece another 40 feet," said Dave Casey, the museum's director of engagement. "It takes 12 to 14 staff members and volunteers to move the entire panorama forward. So it's not hard, but it's labor intensive."

When it was first displayed in 1848, it was like going to the movies.

"When it was originally displayed to the public, it would have been set up at a theater, and they would have it on two rolls and they would turn those roll

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