"Did they go to a castle?"

Translation: ¿Fueron ellos a un castillo?

[Rygar]

Why is 'Ellos se fueron a un castillo' incorrect?

[rspreng]

'ir' means to go and 'irse' means to go away, or leave, if that makes a difference "Mis padres se fueron al campo" = my parents went away to the country.

[cooksen]

Could you also leave out 'ellos' so that it's: Fueron a un castillo?

[liang.li]

Yes!

[iskalada]

isn't there a corrent past form of "va"?