Redstone building ideas?

I'm bored and thought I would ask the Minecraft Community what I could build redstone technology.

I'm currently building a huge tower on my own survival server up to the maximum height that is full of technology and an emergency bunker and such. Everything fully automated with important farms. It's a lot of work but maybe a little inspiration if it's not boring.

Minecraft PC from Redstone with games.

Look at my comment and you're still building after 20 years>; D

Huge TNT cannon with redstone elevator.

Build a fully automatic shop or restaurant, a cinema that plays a small film, farm, a modern house (with keycard, light, elevator, …)

Thanks for the ideas!