Dramatic clouds

Another photo from the same location as yesterday. I had some very dramatic and dark clouds over the mountains. It was also getting late. I hope this photo indeed looks quite dramatic and dark.

Here is EXIF data:
Camera: Canon 50D
Lens: Canon 10-22 USM f/3.5-4.5
Focal length: 22 mm
Aperture: f/16
Shutter speed: 1/2 s (for the "normal" exposure photo)
ISO: 100

Location:

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Where was this photo taken:

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