[cogitator]

[Miss Marple]

Is that Alexander von Humboldt's Castle in Berlin? (I lived in Berlin for a couple of years back in the sixties and visited it.) I didn't realize at the time who Humboldt was until I went back to college and started working on my degree.

[capitan_refugio]

Reminds me of Scotland.

[aShepard]

Is that the cathedral in Ulm?

[Bigg Red]

I have no clue, but my curiosity is aroused regarding the geology angle. Some unusual quarry or quarry technique was involved perhaps?

[kcar]

Is this the cathedral that was built with the rock created by the meteor crash, e.g., the whole region sorrunding it is an impact zone?