I'm assigning the British Museum to the Shire because it's just one big, mad Mathom house. I've been there many times but I find something new on every visit. This time it was Dr John Dee's magical objects, including the 'Tablet of God' and his Obsidian mirror, used in magical rituals and jiggery pokery to do with alchemy. That counts as very cool indeed to me.
I'm also assigning Pre-Raphaelite art. The colours look bright in prints, but the actual paintings are incredible, particularly the blues, which are intense and moving. And they bring out the effusive art critic language in you.