... and explored inside pretty thoroughly.

The puzzle may take longer to solve than to find.

The puzzle is underground.

Start the Psalm 46 video. Go behind the theatre screen. Once the white circle appears, line it up with the glowing white pipe at the right. Wait. Once the circle has fully eclipsed, it will make the end point.

How to make it easier:

  - The video is around 57 minutes long.

Computer users:

  - Turn off your mouse or anything that acts like a mouse while waiting so you don't accidentally click and stop the puzzle too early.

  - Be aware that pressing SPACEBAR also stops the puzzle.

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It is located somewhere in the theatre room under the windmill.

Parts of the puzzle are in one of the videos.

You have to have gotten into the mountain.

You have to know a code that you get by beating the timed Challenge. You will know what that is if you get there.

The start and end point are both inside of the video. The line is not in the video.

You need to have both of the doors behind the theatre screen open.

The video you need to solve this puzzle is called "The Secret of Psalm 46". It's the fourth panel from the left.

(This video is unlocked with the code you get from solving the Challenge.)

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Now think about how you could get an end point.

Look at what is right behind the puzzle.

Look at what is happening in the video.