New glass floor offers views of the 57-meter drop from the Tower 's first floor . At 312 meters , it was the tallest building in the world until New York 's Chrysler building overtook it in 1930 . Paris Mayor Anne Hidalgo says glass floor shows the city can still amaze its visitors . Hide Caption 1 of 7 Photos:World's tallest building to open in 2017
New glass floor offers views of the 57-meter drop from the Tower 's first floor . Paris Mayor Anne Hidalgo says glass floor shows the city can still amaze its visitors . Hide Caption 1 of 7 Photos:World's tallest building to open in 2017