From PathfinderWiki

Vhunsaub is thought to be an ancient underwater treasury of the Ghol-Gan, and is located among the Cannibal Isles of the Shackles. Many have tried to explore the ruin, but none have progressed past the entrance guarded by a magically compelled sea serpent.1


  1. Mike Shel. (2012). Isles of the Shackles, p. 17. Paizo Publishing, LLC. ISBN 978-1-60125-408-5