The Saadian Tombs are definitely worth visiting, but they can be a little tricky to find, which honestly helps keep the crowds down. It's one of the best places to really admire the incredible craftsmanship of Moroccan architecture, from the intricate tilework to the carved wood and detailed ceilings. Even if you're not usually into history, it's a beautiful place to wander for a bit.
Pro tip: don't second guess yourself when you're walking down the narrow alley that feels like it leads to nowhere; that's exactly where you need to go. There are no major signs near the tombs letting you know you are in the right spot. The entrance doesn't really look like an entrance, but once you spot the small ticket desk, you're in the right place.