The Ruien Once the open sewers of one of Belgium’s biggest city, now a network of forgotten underground tunnels. No poo down here anymore, just rainwater. Share this:FacebookGooglePinterestMoreTumblrLinkedInEmailPrintTwitterLike this:Like Loading... Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.