It seems we will never see Valenwood in Skyrim so I decided to do something :)

FEATURES:
- Tree house with unique wood elf-inspired interior. No key as required. All items are static.
- Small wood elf village with a custom sanctuary (and blessing) and five inhabitants: three hunters, a marksman trainer, an alchemy trainer and various friendly animals.
- Beautiful tree terrace overlooking Eastmarch.
- Small dungeon under the tree.
- Nargay, a rideable armored panther.
- New sword (with unique enchantment).
... and many other small features and secrets.

UPDATE 1.1
-Reworked some navmesh.
-Fixed missing textures and correctly repositioned some objects.
-Added floating elevator to reach the tree-top from inside the house.
-Added a small rope near the main house to reach the tree-top directly.

UPDATE 1.2
This is the final version with all the correct meshes and textures and I took the opportunity to add something more:
-Added a custom enchantable amulet near the enchanting table.
-Replaced the Shrine of Kynareth with Y'ffre (thanks to FrankFamily!).
-Added a small tree near the main house with bedroom for two follower.
-Nargay is now summoned from his altar. It will follow you everywhere after you exit the dungeon
  (fast travel to any location and it will appear). To dismiss it you will have to go back to the altar and deactivate it.


COMPATIBILITY:
IT MUST BE COMPATIBLE WITH EVERYTHING EXCEPT MODS THAT MODIFY THE SAME AREA.

NOTE:
- Fully navmeshed (but there may be some errors)
- Currently, the tree doesn't have a correct LOD. You can run Dyndolod to fix deleted/moved pine trees.
- The other houses require a key but are still empty (sorry, but I have no more time for the mod)
- Other mods have appeared in screenshots: Origins Of Forest, Veydosebrom Regions, Enchanted Vanilla Trees, Rudy ENB.

CREDITS:
Gendundrup: Nexus Creature Resource, Spriggan Statue Resource
Ac3s: Telvanni Tower Resources
Vicn: Creature Pack
baronf: Bosmer City Kit Resource
Elianora: Extra Resources (and inspiration)
DarkFox127 (for excellent tutorials)
InsanitySorrow: Clutter
Blary: Clutter, Wall Art
OrinLinwe: Winter Holiday Resource
Tamira / Stroti: New Plant, Sheogorad Resource, Mushroom House Resource
Oaristys: Modder Resource Pack
Earrindo: Telvanni Mushroom Resource
Angilla:  Forest Throne 
elinen: Trees Resources 
xDarkOdinx: Spell FX Recolor
ImperialSociety: Ayleid Resources 
nickorasu: Religious Resources
tumbajamba: Creatures Mount
RoboBirdie: New Creatures Resources
Saerileth: Gemling Queen Resources
Mihail: Animal Bones

I hope I have not forgotten anyone, otherwise contact me and you will be added quickly :)