Can’t leave this challenge yet.
This posts contains two images; both taken at the Hiroshima Memorial Park.
There was a long building which contains exhibits of the bombing of Hiroshima .
I noticed that there was a long line of columns to support the building and they go in pairs.
Although the columns are in reinforced concrete, the texture of the columns have a wood texture.
They have taken very elaborative efforts to come up with a textured formwork against which they cast the column concrete, so on striking of the formwork, they left a timber texture in the columns.
Although, this technique is adopted in many places, this is especially done here as this memorial place clearly warrants it.