first, and 3rd image,images are overlain with the number '69' (turned sideways), repeatedly, in the background. I didn't have any luck extracting to confirm that the numbers never change, from from a visual check, it appears to be the same, throughout.
Edit: Upon further reflection, this sideways
69 is probably a
Cancer Zodiac symbol(♋️), as further emphasized by the name of the DCIM folder on the memory card. (Thank you, kamenf)
The second image (of St. Hedwig's Cathedral) does not appear to have a similar overlay.
Edit: Will was right. This image does appear to have the same overlay. I've attached another image, so you can see it, but it's really difficult to see.
This either means that the railway station is probably near St. Hedwig's Cathedral (Of which there are two nearby subway stations, but no railway station within very close proximity) or that the other two images have some other data that needs to be found, and this one can be discarded. (Note that St. Hedwig's Cathedral is less than 1000ft from water; Water is the zodiac element for Cancer, though this may be inconsequential.)
(The above quoteblock is probably no longer useful in light of finding the symbol in all images.)
Of note is that the closest Cancer Treatment center (CRF Krebsbekämpfung GmbH) is closest to The Brandenberg, but it is still a good enough distance away from even that to be easily inconsequential.
Here is a snippet of a 244% zoomed in portion of the third image, turned sideways, so you can see the overlay. Click to enlarge it so you can see the numbers/symbols.
Here is a contrast-brightness modified image of the Brandenburg Gate where you can see the "69" pop up in certain places of the photo.
The images are also in JPG format, so any data that may have been once stored in them is likely gone, unless it was done after compression. For example, the Cancer signs appear to have been done, prior to compression, so they are difficult to read. (Just in case, I've run an LSB check on them, and came up with nothing.)
Lastly - all three images were last modified at the same moment. So whatever occurred with them likely happened to all three. Which means there was probably a final pass of something after the images were modified originally.