Sarn Gebir
The Fellowship of the Ring #152 (x1)
Location
3 (4)
River.  

Immune to player card effects.

Forced: When Sarn Gebir is explored, deal 1 damage to each exhausted character.

"Boats of the Elves would not sink, maybe." he said, "but that does not say that we should come through Sarn Gebir alive. None have ever done so yet." –Boromir, The Fellowship of the Ring