need help finding this sci-fi anime

[boonanuh]

so im looking for an anime that i watched a long time ago, it was like 2011-2013 maybe??? that i watched with my mom that we both wanted to see again. It was definitely around the PG rang and sci-fi. I think it centered around a boy that discovered aliens/angels/otherwordly beings and the boys attempt to save the world? It had a pretty small cast i think . It was a pretty dramatic anime with really beautiful graphics. My mom remembers there being a huge wall at some point and something floating in the sky(possible space ship). I remember the boy(or i guess kid i dont remember the gender exactly) having either a fight or some sort of discussion in this castle-type place and then i believe there was a flood…? it would have been on either netflix or crunchyroll at the time. srry this is so vague

[Koshigaya23]

On 5/6/2020 at 11:01 PM, boonanuh said:

so im looking for an anime that i watched a long time ago, it was like 2011-2013 maybe??? that i watched with my mom that we both wanted to see again. It was definitely around the PG rang and sci-fi. I think it centered around a boy that discovered aliens/angels/otherwordly beings and the boys attempt to save the world? It had a pretty small cast i think . It was a pretty dramatic anime with really beautiful graphics. My mom remembers there being a huge wall at some point and something floating in the sky(possible space ship). I remember the boy(or i guess kid i dont remember the gender exactly) having either a fight or some sort of discussion in this castle-type place and then i believe there was a flood…? it would have been on either netflix or crunchyroll at the time. srry this is so vague

Just a wild guess...It may have been Miyazaki's "Tenkû no shiro Rapyuta (A.K.A. Castle in the Sky)."

 https://www.imdb.com/title/tt0092067/ref_=ttpl_pl_tt