2. Running 500 Marathons in 500 Days
Unlike many of the other feats that made this list, this is perhaps the one that took the most will power and dedication to make it through without giving up. The thought of doing one marathon is enough for most people, let alone doing 500 marathons on consecutive days. This was completed between the 1st of October 2010 and the 12th of February 2012 by Ricardo Abad Martinez throughout Spain.