|Manzanares el Real (Spain)|
I made some mail art with this one...
|Dunvegan Castle (Scotland)|
The postcard with this non-Royal-Mail stamp took ages to arrive!
|Castell Caernarfon (Wales), 1978|
|Eagle Tower and Queen Eleanor's Gate|
Castell Caernarfon (Wales)
Stamps from 1969
Nice to have several stamps featuring the same place!
|Vajdahunyad Castle (Hungary)|
|Henkenshage (the Netherlands)|
According to Wikipedia, not a real castle but a manor house.
The first stamp on this post was the Spanish contribution to the EUROPA stamps contest in 2017. And the stamp below was Finland's stamp (and one of my favourites!). You can see all the EUROPA 2017 castles here.