Riyadh doesn't try to be pretty. It's a flat, fast, car-shaped city of about 7.7 million people on the Najd plateau, and for most of the last century it was a place visitors flew into for business and flew out of as soon as they could. The old joke calls it the dead center of the kingdom. That joke is out of date. The country has issued tourist visas only since September 2019, and the city now has a driverless metro, restored mud-brick districts, cinemas and a winter entertainment festival that fills whole boulevards.
The history is shorter and more dramatic than the skyline suggests. Diriyah, on the northwestern edge, was the first capital of the Saudi state from 1727 until Ottoman forces destroyed it in 1818. In January 1902 a young Abdulaziz ibn Saud rode back from exile in Kuwait and took the Masmak fortress in the center of Riyadh, which began the process that produced the kingdom in 1932. Both places are open to visitors now, and they're the best reason to come. Three days is the right length: it covers the old center, Diriyah and one proper trip into the desert, before the city's sprawl and traffic start to wear on you.
The plan runs from old to new to wild. Day 1 is the historic center around the Masmak. Day 2 is the Kingdom Centre by afternoon, then Diriyah at sunset and an evening at Boulevard City. Day 3 is the National Museum, a long lunch and a 4x4 trip to the Edge of the World cliffs for sunset. Start on a Saturday: Friday mornings are slow across the city, and Diriyah falls on Sunday, a workday, when it's calmer than at the weekend. More on the country is on the Saudi Arabia page.
Before you book. Most Western passports qualify for the tourist eVisa (apply at the official portal, visa.visitsaudi.com) and your passport needs 6 months of validity. Women visitors don't have to wear an abaya or a headscarf, but everyone is expected to dress modestly, with shoulders and knees covered. Alcohol isn't sold to visitors. Go between November and March: July and August regularly pass 40 degrees C by a wide margin, and the daytime heat in a Riyadh summer is a reason to stay in a mall. Prices below are in Saudi riyals (SAR) with USD and EUR in brackets.