The Eiffel Tower
is a wide-world famous landmark located in Paris, France
which has made cameos in many Disney films and series over the years.
In "Rollercoaster" Phineas and Ferb landed on the Eiffel Tower and slingshot to space.
In "Phineas and Ferb Summer Belongs to You!" the Eiffel Tower had made a cameo, and Heinz Doofenshmirtz and his daughter Vanessa went in it.
When Remy becomes separated from the others and ends up marooned underneath Gusteau's restaurant in Paris. When Remy goes to the surface to see where he is, he can see the Eiffel Tower.
The Eiffel Tower is seen during "Be Our Guest". It is displayed by Lumière, the plates, and the silverware.
The Eiffel Tower (seen in the background) in Ratatouille