Visitors must pass through security at the bullet-proof glass barriers surrounding the tower's base. The two entrances to the glass enclosure are on avenue  Gustave Eiffel; the two exits are on quai Branly. Ascend as far as the 2nd floor (either on foot or by lift), from where there's a separate lift to the top floor (closed during heavy winds). Pushchairs must be folded in lifts and bags or backpacks larger than aeroplane-cabin size aren't allowed. Note that the top floor and stairs aren't accessible to people with limited mobility. Pre-purchasing tickets online gives you an allocated time slot and means you only have to queue for security. Print your ticket or show it on your phone. If you can’t reserve your tickets ahead of time, expect lengthy waits for tickets in high season. Stair tickets can't be reserved online. Buy them at the south pillar, where the staircase can also be accessed: the climb consists of 360 steps to the 1st floor and anoth