01 Jemaa el-Fnaa & the souks
Free, and the only thing in Marrakech where a guide is close to essential on a first visit — not for the sights but for the navigation and the prices. Guided medina walks start at €40. The square is two different places at four in the afternoon and at nine in the evening; go twice.
02 Bahia Palace & the Saadian Tombs
A few euros each at the door, no advance booking, and rarely a queue worth avoiding. Bahia is the one to prioritise if you pick one: courtyards and ceilings rather than rooms. Both are quiet before ten in the morning and crowded by noon, which is the whole planning problem.
03 Jardin Majorelle & the YSL Museum
From €15 for garden entry, and the only site in the city with a real queue: timed tickets are sold online for the same price and skip it. The garden is small — an hour is generous — and the museum next door is a separate ticket that most people are glad they bought.