• Looking for a well secured underground base? Then this is exactly what you need!
  

Features:

• Protected entrance. Double protected.
  
• Hidden in a little hill.
  
• Includes interior.
  
• Hidden windows. Which can be opened and closed.
  
• Emergency exit.
  

If you want more features added please put it in the comments!

Here's a little guide on how to get in ;)

1. Access the base with the trapdoor.
   
2. At your left there is some sort of cave. In that cave lies a lever. Flip it.
   
3. Now you can enter the base.
   
4. You're now in a room made out of noteblocks. One of them is a jukebox if you put a disk in it and take it out a door will open.
   
5. Before you get in flip the lever in the noteblock room. This will close the entrance.
   
6. You can acces your base!
   

To get out again do the same thing but then reversed. In your base you can find levers to open the windows. And the panorama window. Beneath the base lies a maintenance part. Here you find reactors and water systems. Also there is an emergency exit.

Note: All the signs in this map are in dutch. Because I'm dutch and I also made this for dutch people.