In Prague, there is another Cast named Vyšehrad, built in the 10-th century. I and my friend decided to visit it during our travels to Czech Republic, my girlfriend in the meantime decided to do shopping in Primark... priorities.
We were a bit short of time so we weren't able to read stuff or watch inside the buildings. We just walked a circle around the castle walls.
To me, it looked more like a park than a castle from the inside.
Walking on the walls of the castle you can see pretty nice views over the cityscapes of Prague.
Here you can see the Basilica of St. Peter and St. Paul. This building is inside the castle walls.
Panorama of 2 vertical shots.
There is also a Vyšehrad cemetery, a really beautiful one. There should be many famous people buried such as Antonín Dvořák, Bedřich Smetana, Karel Čapek, and Alphonse Mucha. I don't know any of these lol, I just saw these names on Wikipedia. Maybe you do then tell me in the comments.
If you visit Prague then try to make some time to take a walk in this castle, the area is beautiful there.