Old Water-course
The Mountain of Fire #48 (x1)
Location
2 (5)
Mordor.  

While Old Water-course is the active location, it gains:"Response: When Old Water-course is explored, reduce each player's threat by 5."

Travel: Each player must exhaust a hero he controls to travel here.

Clambering a few steps up he found a tiny stream of dark water that came out from the hill–side and filled a little bare pool...
–The Return of the King