This is probably the tallest concept drawing I have ever done. It depicts the entire year of 2008 in side view. It shows one of the many stalactites with the Matoran villages on top and the great swamp at the bottom where the Codrex would later be found. I know that a stalactite is supposed to hang from the ceiling and that was also the case with this piece of rock but it broke off from the ceiling and got stuck vertically in the deep swamp.
I had a 2-meter tall print of this drawing hanging behind me in the office for years.