Being the only mosque in the whole of Morocco that is open to the non-Muslim public everyday except Fridays. Although it costs around US$20 per person for the guided tour, it is more than just sightseeing, but an eye-opener to the world and religion of Islam. There are four guided tours per day (from Saturday to Thursday at 9, 10, 11am and 2pm) so make sure that you time it well or else you’d be left sitting around and waiting for your turn. And each tour can only take up to about 20 or 30 people.
There are benches on both sides of the mosque and a nice place to sit and take a bite while you're waiting for the tour to start. There is no shade, but the temperature is tempered by the breezes blowing in from the ocean. And occasionally you can hear the whistles of police officers who swarm the grounds.
Having purchased your ticket and been appointed a guide (according to the language you have indicated you'd like the tour to be conducted in), you will be informed where and when to gather for your guided tour. Our English-speaking tour guide was able to explain not just the architecture well but also gave us an insight into the religion. The tours are also conducted in French. And there is a concession for students. Photography is allowed inside but not filming with a video camera.
Before entering the mosque, you are encouraged to cleanse your hands and face at one of the many colourful, mosaic fountains outside the mosque on the esplanade.
At the entrance into the building proper, you will be given a sticker which identifies that you are part of a group tour which is stamped with a number and the date of the tour. After which you will be given plastic bags to store your shoes, as you will be walking barefoot throughout the interior.
On the guided tour, which will take about 1.5 hours, the guide will walk you through the many prayer halls and huge ablution chambers that can accommodate 500 people at any one time. Especially on Fridays, when it is compulsory for the men to go for noon prayers. The prayer halls are divided into an area for men, and an area for women upstairs with windows so they can see the religious master ~ faqih.
Part of the building is built over the cliff and certain areas of the great hall has transparent glass flooring, from where you are able to see through to the ocean below.
At the end of the tour, you are expected to tip the guide, we gave ours US$2 per person. But of course, as always, it is up to your own discretion.
And if you'd like you can take the elevator up the minaret but that costs extra.