Items Taller than Wind Turbines?

[Fruitcup]

Hi guys!
So I'm loving this new update and using the beautiful new castle walls to replace some old designs. I only have one square space behind every wall and I wanted to put wind turbines behind it but they barely peep through. So, I was wondering if you knew of any taller items that are one space thin that can be placed directly behind the castle wall and be seen?
I was thinking utility poles, baobab trees, and festivale balloons but I haven't tested them yet..
Thanks~

 

[Faux]

Are you able to terraform behind them to prop the items up? Depends what level your castle is on, so not sure if this is possible. If it is, I'd try that. :>

 

[RollingAntony]

I think that the Castle Tower is the tallest item available alongside the Festivale Balloon Lamp and others. The lamp also barely peaks behind it, as they are "tied" height-wise.

Like Faux said, if you are able to put a small cliff behind you can get interesting results:

You could probably also do the cliff, put a pillar item like the Frzoen Pillar and stack a small item on top- that will give you more possible combinations and options.