Eiffel Tower
Constructed from 1887 to 1889 as the entrance to the 1889 World's Fair. The tower is 324 metres (1,063 ft) tall, about the same height as an 81-storey building, and the tallest structure in Paris. Eiffel Tower is the most-visited paid monument in the world; 6.91 million people ascended it in 2015.