In January, climbers Kevin Jorgeson and Tommy Caldwell set a record by being the first to free-climb the 3,000-foot walls of El Capitan, a vertical rock formation in Yosemite National Park in California.

It's considered to be one of the hardest climbs in the world.

The climbers documented their climb with incredible photos that show just how hard their journey was.

Here is the Dawn Wall on El Capitan, where we get a glimpse of the wall's height and the beautiful scenery of Yosemite in the background.

From afar, it's difficult to see just what the climbers went through in order to set their record, but when you look closer, you can see that the two used tiny cracks in the walls to help them with their ascent.

Because of this, they would often battle raw fingertips. Here, on the ninth day of their journey, Tommy Caldwell sands the edges of his fingers to avoid any tearing that can happen when heading back up to the rocks. The ascent was planned to be completed in around two weeks, so they had tents they would rest and sleep in during their climb. Besides the time they would spend climbing, Kevin and Tommy also faced the challenge of getting relaxation time in their tents. According to photographer Corey Rich who uploaded this image, the two would do yoga, update their social media, and charge their electronics with solar panels, which is what Tommy is repositioning here.

Here, we can see how the climbers would find edges and cracks to help get to the top.

After the sun set and it began to get dark, they would use flashlights attached to their head to continue climbing. Here, Kevin tackles the "Dyno Pitch" which is one of the hardest parts of the climb considering you have to jump six feet and clasp onto an edge to control momentum. Climbers will position their bodies in unexpected ways to scale walls at the best angles, which is why they sometimes refer to their sport as "dancing up rocks."

Finally, after 19 days of the difficult endeavor, the two celebrated their record-breaking journey to the top of the Dawn Wall.