Possible Clues:

• Maze
• Complicated network of passages
• Daedalus creation
• Building material containing briny solution for complex construction
• Misleading passages found here?
• Complex network of passages
• Source of some amazement to old Greek hero?
• Tricky place to navigate possibly by thin rail I avoided
• Elaborate maze built by Daedalus to hold the Minotaur
• Heading north by rail, convoluted and perplexing route