2025-02-03 Channel Structure of A Portal Type 1, Germany

On the left side in the portal the channel structure is observeable.
Music by Thomas D
http://www.youtube.com/@TheFantifan
https://www.youtube.com/channel/UCJJCsx_BlIy0KbkRahv3BNg

I have all the original files of the photos (more than 500) at

https://eu.zonerama.com/Beginning/1450079

Use of the files is free, provided the photographer and email address (see exif) are stated!
Please write me a short e-mail when publishing so that I can also include your analyses and hypotheses in my considerations.