"daar zo" meaning "over there" and "het park is daar" meaning "the park is over there" (Dutch 3 for British English speakers)

Official Memrise Courses Dutch
1

Why do the Dutch write “Dar zo” for “over there,” but “het park is daar” (without the “zo”) for "the park is over there. Reference “Dutch 3.”

2

There is a forum for “Dutch for English speakers”, is that the course you are using?

Here is the forum:

http://community.memrise.com/t/course-forum-dutch-1-7-by-memrise/