One little thing tidbit though - if this video was made after 2004 then the 75 foot tall sundial they show toward the beginning isn't the largest sundial in the world. There might be bigger yet, but I know for sure that the Sundial Bridge in Redding, CA is 217 foot tall. I have to say it's pretty dang cool to see, let alone walk across - it's a walking bridge across the Sacramento River that's planked with glass strategically designed to be a sundial.
"Instead of Pay It Forward I prefer Plant It Forward" ~Howard Story / "God has cared for these trees, saved them from drought, disease, avalanches, and a thousand tempests and floods. But he cannot save them from fools." ~John Muir