What else can I build?

I have a picture of my minecraft survival castle here. I wanted to ask if one of you good minecrfat players had an idea what I could build in front of my castle

Kp have thought about maybe a market is bursting but don't know how to build one so if you answer it would be good if you could add a picture

E.g.

a fountain

A horse stole

A garden

Odet just distribute a little hay

A kind of workshop and stuff

Then you can also breed villagers there later