Yester Castle - Credit: Wikimedia Commons
Yester Castle is a ruined castle, located southeast of the village of Gifford in East Lothian, Scotland. The only remaining complete structure is the subterranean Goblin Ha' or Hobgoblin Ha' (Goblin Hall).Pronunciation note: The "Ha'" in "The Goblin Ha'" is normally enunciated "Haw". It is a Scheduled Ancient Monument, recorded as such by the Royal Commission on the Ancient and Historical Monuments of Scotland. Read more on Wikipedia
Source: en.wikipedia.org