The flood that filled the Mediterranean Sea - in one year
The flood that took place in the Mediterranean was what inspired the plot of the biggest XKCD ever, a time-lapse slideshow that took place over 123 days and 3,102 panels: https://en.wikipedia.org/wiki/Time_(xkcd) .Here's a site that lets you step through it one panel at a time: http://geekwagon.net/projects/xkcd1190/ . Well worth a read.