Inside an abandoned tent(s)
This tent obviously belonged to whoever took care of the Rangers' medical needs. While the Rangers were all quite capable of living off the land, it only makes sense that during times of war they'd sustain wounds that couldn't be healed through mere first aid. Bottles and jars of medicines lay about the room, but appear to be broken or empty. Any other furniture that was once here was either removed by the retreating Rangers themselves, or more likely taken and broken by the Morgul army.
The only obvious exit is south.