Which famous landmark grows taller during the summer?

Hints

It's made entirely of iron.
It's in Europe and was built for the 1889 World's Fair.
It's in Paris.

Reveal the answer

Answer: The Eiffel Tower

Also accepted: Eiffel Tower, eiffel tower, Eiffel, Tour Eiffel, La Tour Eiffel

The Eiffel Tower is made of iron, and metal expands when it heats up. On hot summer days, the tower can grow up to about 15 cm (6 inches) taller than it is in winter. The sun can also heat one side more than the other, so the top of the tower slightly leans away from the sun during the day.

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