Why in this case it's not "Grandajn Kontinentojn"?
estas does not take the accusative case.
Danke! Does any other verb work like that?
Only transitive verbs take the accusative ending, so intransitive verbs like esti fariĝi etc don't, you'll learn more about it later on in the course :)
Ok, thank you!
Vikungen it helps the understanding. Thank you!