Winning a gold medal in the Olympic Games is, by itself, a huge achievement and a dream come true for any elite athlete. Repeating this feat is something that very few have achieved, and doing so has elevated these individuals to legendary status.

Now, imagine winning not one, not two, but eight gold medals in a single edition of the Olympic Games. This unimaginable feat was accomplished by the now-famous swimmer Michael Phelps. This remains the greatest individual achievement in one edition of the Olympic Games by any Team USA athlete.

Image: Thomas Park

Another legendary Olympic moment took place many years before Michael Phelps was even born, when Jesse Owens, a Black athlete, won four gold medals in the 1936 Munich Olympic Games.

Despite competing on very controversial ground at the time, Owens blazed his way to Olympic glory and secured his place in the pantheon of the greatest American athletes.

Image: Braden Collum

If you see the distance between Miami and Havana on a map, it doesn’t seem all that far. That is until you start approaching and realize that there are 110 miles between these two places. Believe it or not, this journey has been swum three times. The first two crossings involved a shark cage and several short rests.

The third person to achieve this milestone was Diana Nyad, who completed the swim on her fifth attempt at age 64 in 2013. Nyad used a protective jellyfish suit, shark divers, and electronic shark-repellent devices to achieve an "unassisted" swim.

Image: Matt Hardy

Running a marathon is an impressive feat of endurance and strength for almost any human being. Running two marathons in two consecutive days is nearly impossible for anyone. Now, imagine running 50 marathons across 50 American states in 50 consecutive days.

That incredible accomplishment was achieved by Los Angeles native Dean Karnazes, beginning with the Lewis and Clark Marathon in St. Louis on September 17, 2006, and finishing with the New York City Marathon on November 5. A bit too much, maybe?

Image: Pietro Rampazzo

On the rarest of occasions, humans are capable of physical achievements that defy what the human body is capable of doing. During the 1968 Summer Olympics in Mexico City, Bob Beamon broke the world record for men’slong jump with an incredible jump of 29 feet, 2.25 inches. Yes, that is almost 30 feet.

There was a delay in posting the distance, and Beamon didn’t know what the metric figure that finally appeared on the board equated to in feet and inches. When a teammate told him he had jumped over 29 feet, he collapsed on the track from the realization of what he had accomplished.

Image: Gabriel Sanchez

Winning a world tennis championship is a significant achievement for any tennis player. That is, unless you are a tennis player so accomplished that winning these tournaments is as regular as anything. The list of people who do that is very short, and the names on it are all very well known.

One of those names is, without a doubt, Serena Williams. Possibly the greatest female tennis player ever, she won the 2017 Australian Open. This fact alone may not seem out of place for such an athlete. But what sets it apart is the fact that she did so while pregnant.

Image: Kelly Sikkema

How long can you hold your breath underwater? Trained individuals can achieve very impressive results in this field, but one feat that stands out is the one accomplished by American illusionist David Blaine, who, on September 8, 2008, set a world record for static apnoea, by holding his breath underwater inside a tank for 17 minutes and 4.5 seconds.

Blaine is best known for his high-profile feats of endurance and has set and broken several world records. These include standing for 35 hours on a 100-foot-high pillar only 22 inches wide in 2002 and sitting in a clear Perspex box for 44 days in 2003 without eating and drinking only water.

Image: Jakob Owens

In the world of skating, a 360 is the name given to a stunt performed by executing a mid-air spin on the board. This is a complicated trick, achieved only by very experienced skaters. A 720 is a stunt performed by doing not one, but two mid-air spins on the board. As one can imagine, this is exponentially more difficult than a 360, and very few people can pull off this stunt.

Now, if we mention a 900, you might guess where we are going. This involves not one, not two, but two and a half mid-air spins on the board. This insanely difficult stunt was first performed (at least publicly) by Tony Hawk, the skateboard champion, at the 1999 X Games, cementing his status as a skateboarding legend.

Image: Devin Avery

Tiger Woods is a familiar name in the sports world. He has won 14 major golf championships and achieved a level of superstardom seldom seen in the game. However, the one we are choosing to highlight today displays an extraordinary amount of tolerance to pain in the face of competition.

During the 2008 U.S. Open, he played a total of 91 holes with a torn ACL and double stress fractures in his left leg. With a course set up to give players the toughest test of golf imaginable, the U.S. Open is hard enough as it is. Add in debilitating leg injuries, plus 19 extra holes (thanks to a playoff with Rocco Mediate), and you have one of the greatest showings of pain tolerance in the history of tournament golf.

Image: Will Porada

Imagine climbing a huge stone wall approximately 3,000 feet high in less than four hours. Now imagine doing that, without any kind of ropes or safety equipment. That is exactly what Alex Honnold did on June 3, 2017, when he made the first-ever free solo ascent of El Capitan by completing Alex Huber's 2,900-foot big wall route, Freerider, in 3 hours and 56 minutes.

The climb, described as "one of the great athletic feats of any kind, ever," was documented by climber and photographer Jimmy Chin and documentary filmmaker E. Chai Vasarhelyi, as the subject of the documentary Free Solo which, among other awards, won the Academy Award for Best Documentary Feature in 2018.

Image: Jessica Tuttle