
It was a very tough question.
But on the spur of the moment I chose our video about Ytterby, in Sweden.
It was one of the very early videos from The Periodic Table of Videos - our first chemistry "road trip".
I traveled with chemist Pete Licence to the small, disused quarry where FOUR of the elements on the periodic table were first discovered.
They were Erbium, Terbium, Yttrium and Ytterbium - all named after Ytterby!
The video was uploaded quite a while ago and I noted that it had quite poor picture quality by more recent standards.
So today I went into the archives and re-uploaded the video at higher resolution. Here it is:
Pictures from the trip can be found on our Flickr site at this link.