Concrete Treehouse

The  is an unmarked location in Fallout 3's Capital Wasteland. It contains a mattress to sleep on, a locker, and various loot. The treehouse is guarded by a small group of raiders and is sometimes attacked by a scavenger.

Location
The treehouse is located southeast of Fort Independence, halfway in between Fairfax Ruins to the north and Andale to the south.

In fact, it has also been found with one scavenger defending against 2-3 raiders. possibly they just circled around each other in combat, or it's a very specific random encounter.

Notable loot

 * Tales of a Junktown Jerky Vendor