The monument responds to seasonal temperatures, contracting a few millimeters when it's cold and expanding when it's warm.

And no visit to the city would be complete without seeing the Eiffel Tower. The iron structure, now nearing 150 years old, is an iconic part of Paris's skyline and a defining piece of French culture.

It has become the literal symbol of Paris and France, and one of the wonders of the contemporary world. The Eiffel Tower is ...

The tower’s metal frame weighs 7,300 tons and has 18,038 iron parts and 2.5 million rivets. But those numbers have fluctuated over the years, as renovations have resulted in various parts being ...