These cool mountains can be found in China. Zhangye Danxia to be exact.
And yes, they are 100% real. You know what to do to see more!
source: BBC Blog
The mountains above received their cool colors naturally. In other words, they were not painted, dyed, or changed by man.
The cool appearance came from a process called sediment deposition.
scoop tip: Sediment is solid materials that are moved from their original location by air, water, gravity, or ice to a landscape or field. Deposition happens when the amount of solids that are being carried becomes too heavy to move.