These tourists see the writing on the wall.

French art lovers are flocking to industrial Brooklyn in droves for quirky walking tours of warehouses sprayed with graffiti and street art.

The niche fascination is still going strong despite a major industry group projecting a nearly 20% drop in overall foreign tourism to the Big Apple this year. 5

“There are so many people in France that are obsessed with graffiti and street art: It’s been a huge part of our business for years,” Bushwick-based Graff Tours tour guide Audrey “Byte” Connolly told The Post.

Connolly, who has led walking tours of the hipster neighborhood’s urban art for nearly a decade, attributing trailblazing cultural similarities in New York and Paris for the grand amour.

As tour guides across the city report an abs

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