Paris's Iron Lady is celebrating her 125th birthday with a modern, $38.4 million facelift. She’s come a long way since her debut as a temporary attraction in 1889.

The Eiffel Tower's new dramatic glass floor is on the first observation deck, providing visitors with a dizzying, vertigo-inducing view of the city below. While tourists have historically breezed past this 187-foot panorama for a higher perspective, tower management hopes this new birds-perch over the city below will lure visitors away from the top.

Other changes include the reimagined security fence, transformed from a garish necessity into an extension of the glass-bottomed lookout: all curved, clear panes that flex outward and don't obstruct the views of the tower or city beyond.

Two new pavilions—glass-sided, of course—house a restaurant, a shop, a 200-seat auditorium, and an immersive museum. A stroll through the first-floor leads visitors past seven projectors displaying overlapping images of the tower throughout history, while outside, showcases feature information, images, and artifacts about Gustave Eiffel and his most-celebrated work.

Melanie Lieberman is the Editorial Projects Assistant and a member of the Trip Doctor News Team. You can follow her on twitter at @LittleWordBites.