You need to book your trip in advance and normally you go 30 min before the visit time. If you do not book and you want to get tickets just before your visit you have 2 scenarios: 1. Wait for 45-60 min in line 2. Find no tickets

I believe yes. There was a young couple from Canada in front of me in the queue and they paid a reduced rate using their passport as id

А в чем вопрос?

Lots of stairs, but also ramps and elevators for people with limited mobility. You are golden for most (if not all) rooms. The auditorium was closed when we were there 2 weeks ago, but I am sure that if the rest is entirely accessible, so it the auditorium!

Si si puedes pasar mochilas , no sé si puedas comer ahí lo que lleves , pero agua si pude tomar de la que yo traía .

Disculpa, pero no te conviene mucho más reservar la París Pass y ya tienes tu entrada incluida. A mí realmente, me solucionó la visita a muchos lugares. Eso sí no tienes la entrada a la Torre Eiffel, ni al Moulin Rouge, pero los museos están todos y muchísimos lugares más. En algunos hasta te evitas las colas...y eso a la hora de viajar ayuda mucho. Suerte.

I highly doubt they would close a major attraction like the opera down unless there was a major event or unforeseeable issue. Best to book ahead on a site such as Viator where you can check availability ahead of time, order a skip the line ticket and get a refund (usually) if something comes up.

Hi sorry for the late reply No you don’t need to pre book you can pay in the day and although there is an entrance fee it is obviously cheaper than one of the tours Enjoy!

Our group of 4 took about 2 hours. You can linger longer or leave earlier. You're not required to complete the puzzle but it takes awhile to go find all the clues, many of which are quite cleverly hidden.

Oui sans problème, il ne résoudra pas l’énigme tout seul car c’est un peu difficile mais aimera sûrement le lieu et les décors.