BALKAN BOTANICAL GARDEN OF KROUSSIA
ΒΑΛΚΑΝΙΚΟΣ ΒΟΤΑΝΙΚΟΣ ΚΗΠΟΣ ΚΡΟΥΣΣΙΩΝ
In the forest area of the garden there is an area devoted to plants which live on high mountains
Here are some photos of the area and Sedum ochroleucum, European stonecrop.
I like that the notice writes where the plant was collected, Pieria, the home of Mount Olympus