The fountain with dogs shown in 'Paris' is located in Berczy Park, Toronto, Canada. The fountain, by landscape architect Claude Cormier, was added to the park in 2017. It features 27 cast iron dogs, one rather scared cat, and a large bone.
Despite taking place in Chicago, much of the film was shot in Toronto, Canada. During the scene in the dinosaur museum, they are, in fact, inside the Royal Ontario Museum in downtown Toronto.
At around 47 min, while getting lunch at a hot dog cart, Sophie asks JJ when she can have her first assignment. JJ asks her if she knows anyone in the apartment building across the street. When Sophie says "no," JJ tells her that he wants to see her on one of the balconies after talking her way into an apartment within ten minutes. Sophie tells him she only needs five and surprises him by showing up on several in short order. This test is just like in "Spy Games" where Robert Redford gives Brad Pitt a similar task with the same result.
When JJ fights at the airfield in front of a running engine, Bobbie monitors the conflict back at their base of operation. She comments that the whole scene is very familiar, just lacking some Nazis! She's referring to the scene in the first Indiana Jones movie when Harrison Ford has to fight a Nazi guard in front of a running engine.
When JJ first enters Sofia's apartment to plant cameras, he needs to briefly hide in Sofia's closet. He camouflages himself in stuffed animals to hide, reminiscent of how ET (E.T. the Extra-Terrestrial) hides himself in Elliot's closet.