Can you believe Knossos is still not world heritage? Can you believe none of the sites in Crete are world heritage? Can you believe Greece favors Spinalonga, a leper colony, over this?! Finally, can you believe the entrance is €15 or €16 with the museum! (also can you believe an elderly Israeli couple tried to get a free entry due their nation being in the Eurovision contest lol)
Unfortunately without a guide there is very little to see at the site. Sure you see the famous half broken fresco of the minotaur, the red columns, lots of crumbled remains of a once fancy palace. You get to see more statues in the museum which in the end is a more worthy visit. There are other places on the tentative list for this entry but I would consider Knossos the main one.
My main problem with the site is the lack of access to several areas. Unlike Pompeii where there is still clearly work done, here places are just off limits and you can glance at it from far away. Great site, bad presentation. Recommend you to look up the history yourself before visiting.