What is this castle

[Naruto99Uzumaki]

its where kaguya is preparing her bed for naruto. naruto shall do the same

 

[The Work]

Like the castle is shown in the lava place & ice place.

Kaguya has to be manipulating the weather

 

[AlphaScythian]

Looks like kaguya wants zetsu slaves to build castles in all and every dimention

 

[Seventh Sama]

Its kaguya's home. She is said to be a princess.

 

[zorakovic]

kishi draw the castle twice to show us that Kaguya change the time and not the place
Once in the Cretaceous age and again in the Ice Age... the same castle but different ages

 

[sammypt Miyamoto Musashi]

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Shake this globe and watch the snow fall baby!!!!!

& dontcha just know that Sakura is gonna get one really REALLY strong punch either right in Kaguya's byakugan blind spot or right into her 3rd eye hole!?!?! Followed by a "Keep yer dirty mitts off my men!!!!!" Then kisses both Naruto and Sasuke back to health It's a mutual non-whorish type thing. Beautiful....