Robin's refuge

• Grotto under Wayne Manor, and an apt title for this puzzle
• Secret DC headquarters
• Lower part of Wayne Manor
• Superhero's secret station
• It lies beneath Wayne Manor
• Subterranean hideout in comics
• Secret headquarters for Bruce Wayne
• Part of Wayne's world

Wikipedia Word definitions in Wikipedia
The Batcave is Batman's secret hideout. Batcave or Bat Cave may also refer to: Batcave (club) , a Gothic rock nightclub Bat Cave, North Carolina Bat Cave and Cascade Caverns State Nature Preserves , a nature preserve in Kentucky dedicated to protecting ...