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Nice sketch. But the bridge is a massive version of a simple "clapper bridge" (stone slabs atop stone pilings; see Google images of those on Exmoor, etc.). The castle crowns a rocky bluff overlooking one end of it, NOT blocking the road to the bridge, nor attached to the bridge.
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Replying to @TheEdVerse @mineirodabahia
The question was about Zundbridge being a castle, or spanning the bridge. The answer continues here: x.com/TheEdVerse/status/1065…
Ed Greenwood@TheEdVerse
21 Nov 2018
Replying to @mineirodabahia
You've drawn a very nice "this would be the smartest defensible way to do this." What happened: the wizard Zund built a necessary road bridge "in the middle of nowhere," and later soldiery of the Deep came and built a castle on a nearby defensible height overlooking the bridge.

Mar 17, 2026 · 4:14 PM UTC

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Replying to @TheEdVerse @mineirodabahia
x.com/TheEdVerse/status/1065…
Ed Greenwood@TheEdVerse
21 Nov 2018
Replying to @mineirodabahia
Google "Restormel Castle" for an approximation of the size of Zundkeep. Except, of course, Zundkeep isn't ruined, is on a MUCH higher and rockier bare stone height with a single zigzag road up to it, and has a tall cylindrical main keep tower.