I would go back to Marrakesh in a minute. It is a wonderful city, with great restaurants, wonderful old riads to stay in, many souks and beautiful architecture. Here are some of my favorite highlights:
The Jardin Majorelle in Gueliz, is really beautiful. The gardens were built by Jacques Majorelle, a French orientalist painter in the 1920’s. His blue villa is now a museum of Islamic art. The gardens and fountains are really lovely.
Koutoubia Mosque and minaret: Built in the 12th century, this mosque is beautifully decorated and the famous minaret totally restored.
Saadian Tombs: On Rue de la Casbah, next to the Casbah Mosque, 66 sultans and their retinues lie buried under simple tile and marble markers amidst elegant pavilions. There is beautiful stonework and tiles throughout.
The Palais de Bahia: This is a lavishly decorated 19th century palace built by the grand vizier, Si Ahmed ben Moussa. The gardens, courtyards and reception halls are impressive.
La Mamounia Hotel: This luxury hotel, built in the 1920’s on the site of a sultan’s palace, was recently renovated and is a must see. For me it is way too large to stay in, but at least go and walk the grounds and have tea in the gardens or a drink in the bar.
Place Dejemaa El-Fna: This is where it all happens in Marrakesh. It is an impromptu medieval circus with snake charmers, performers, souvenir sellers, barbers, storytellers, dancers and countless food stalls with countless aromas. There are also fire swallowers, healers, shoe shiners and much more. The time to go is at dusk when things really come to life. Experience it up close and also from an outdoor rooftop of one of the many rooftop cafes that ring the square. It is a great scene that is not to be missed! Be prepared to pay something it you take pictures of some of the people.
Explore the Medina and its Souks: This is a must. The narrow streets and bustling atmosphere is great. I love the spices and dried fruits along with the carpets and antiques. You might consider a guide, though this is much easier to maneuver in than the Medina in Fez. The Medina here is also an UNESCO World Heritage Site. I liked the colorful Souk de Teinturiers or wool and silk dyers souk.