The Lost Dragon Dungeon is a new dungeon set outside of Riverwood. The location of the dungeon depends on the file you are using. Version 2.0 is outside of Riverwood while Version 2.5 is towards Solitude. See pictures. Upon coming close to the Nordic ruin you will see a CUSTOM VOICED NPC. Talk to him to receive a short quest that takes you into the dungeon. Upon entering the dungeon be sure to activate the shrine at the end of the hall. It is not required but it helps a little. I HIGHLY recommend the mod Hateful Wenches, as it adds significantly to the overall amount of combat.

Some points to note:

The majority of enemies should be based off of the players level but use caution around certain enemies. 
    
The voice for the npc is a little low but I dont have a studio mic so forgive me. lol

The door when leaving the dungeon might not show correctly. I have no idea why. It still is fully functional though. (fixed in version 2.5)

This is my first ever mod so be nice. lol (I royally screwed up on the first download, it worked perfectly fine on my end but I forgot to include necessary files for the Custom Voiced Quest and the shrine.) I then screwed up on moving the files to a new version of the mod and now it no longer works on my end, so I wont be uploading a corrected version. Right now all this mod is, is a new dungeon with enemies and a new merchant that sells dragon bones and scales but no quest) All that work wasted. smh. I apologize to everyone for my haste in uploading. Words cannot express how disappointed I am in myself.  As of version 2.5 everything including the custom voiced quest is working, as far as I know, so enjoy.    

Spoiler:  

Show

The baby dragons in the dungeon sometimes retain their adult dragon hitboxes. So you might bump into them earlier than you should but you can still hit them.

VERSION 2.5
FIXES AND FEATURES:
THE EXIT IS DISPLAYED CORRECTLY NOW
RE NAVMESHED THE CAVE BY HAND
MINOR TWEEKS
NEW LOCATION!!! 
FAST TRAVEL IS UNLOCKED AS SOON AS YOU LOAD YOUR GAME!!!

VERSION 2.0
FIXES:
NO MORE FACE BUG
NO MORE SAPPHIRES AND RUBIES ACCIDENTALLY ADDED TO CHESTS THROUGHOUT SKYRIM
THE CUSTOM VOICED QUEST IS BACK UP AND RUNNING!

UPDATING TO NEW 

Just delete old with mod manager and download the new! :)
If you want to make sure the files are deleted go to your Skyrim SE directory and search "LostDragon" AND "Lost Dragon"(no qoutes) if nothing pops up then congrats. 

Should be compatible with everything other than another dungeon placed at the same exact location.

If the mod is not working or I neglected to mention something please let me know! 
Pretty much abandoned.


REQUIRMENTS

• Skyrim.esm
• Update.esm
• Dawnguard.esm
• Dragonborn.esm

Only if the quest is not working
FINALLY: The custom voiced quest IS working. If you do not get the quest dialogue when talking to the NPC then chances are you don't have an SEQ file. (you should though as its included in the mod) Simply open SSEEdit > right click > select none > tick Lost Dragon Dungeon.esp > Right click on the mod > Other > Create SEQ file