Terrain Explorer (The Holy Grail) Mr Jay Read more posts by this author. Mr Jay 1 Sep 2014 • 1 min read Got this from china still boxed and very good condition for the grand sum of £20. This is my first complete Terrain Explorer 🙂 Now to find the trailers! Subscribe to Explorer 12 Get the latest posts delivered right to your inbox Subscribe Great! Check your inbox and SPAM folder then click the link to confirm your subscription. Please enter a valid email address!