They advertise these as “The Most Beautiful Periodic Table Displays in the World” and, after spending a lot of time clicking on and reading about my favourite elements, I can’t say I disagree.

If you click on Hg (mercury) the text mentions Alexander Calder’s Mercury Fountain in Barcelona (here and several more photos). Beautiful, but I kept thinking “how the heck do they keep that open pool of mercury safe?” (I believe it’s behind glass, but still!)