Every time I get a new Lego set it'll have pieces in it I've never seen before (or maybe I have for some of them but have forgotten). Some of them are like "where have you been all my life???" while others are like.. why...
These were from Titanic
These were from The Starry Night
These were from Himeji Castle
kapgar
That top piece (and a double wide version of it) have been a mainstay of Brickheadz for a while. It's what allows them to build those out in the round.
Others you have there are super WTF, and I don't mean wireless telecommunications facility.
Kazza the Blank One
Yeah I've seen the double before but not the single.
Some are super useful though heh