Help for building ideas?

Hey everyone, I'm still inactive here but I would like to have your opinions on what I should build in my worlds. I have some ideas myself but those have either already been built or not yet possible.

If this is advertising and I'm too stupid to notice, I'm sorry, I don't mean to do that, I just would like building ideas. ^^;

 

Castle. Trees. Shrines. Houses. Windmill. A supermarket. A life-size model of the Effiel Tower and some sunglasses. By the why it's not advertising

 

Or maybe that town you made on some server...

 

Hmm...those are some good ideas, although, I don't recall making towns on any server. Making a town in a world is on my to-do list though. I could do that with a village I saw in one of my worlds.

Any other ideas? I'm sold on the town idea but the others may not be possible.

 

A volcano, a terra formed area of a mega taiga or a beach.

 

Build a TARDIS.