"Мы часто ходим в зоопарк."

Translation: We often go to the zoo.

[SpokeMnemosyne]

"We often walk to the zoo." wasn't accepted. Should be, shouldn't it?

[moshymoshy]

"We frequently go to the zoo" should also work here, yes?

[Sylvia697924]

Or "We often walk in the zoo"?

[vemmv]

What case is zoopark in?

[birgit72635]

It is in the accusative. You go to a place = accusative.

You are at a place = prepositional