It was about a group of children that were trying to combat a witch. They went to something like a dream world through some big pipes, that were in the city park or something. It looked like a Russion or Polish movie. Thanks in advance.
Could be City of Lost Children.
http://www.imdb.com/title/tt0112682/
Not about a witch, but there are a couple of characters who could be mistaken for a witch if you don't remember the movie completely. There are also pipes, lots and lots of pipes.
Sorry, but it's not that! The one I remember was from the 70s/early 80s and it was not as dark as this one. It was from a Slavic country, I guess. It may be Arabella, but I don't remember any pipes in Arabella.
It's Arabela, not Arabella btw. My mistake. :smile: