The 6 most colourful mountains on Earth and how they got their colour

These days, travel isn’t just about ticking off places– it’s also about the stories behind what we see, and how stunning something looks in real life (and on camera). And some places are so visually striking, they feel almost unreal.
Forget the usual snow-covered peaks or green hills. There are a few rare mountains in the world that look like nature decided to paint them by hand, layered in bright, unusual colours. But these colours aren’t fake or edited. They’ve formed naturally over millions of years, thanks to the way minerals in the ground reacted with their surroundings. Iron gives reds, copper brings out greens, and sulfur creates yellows.
Each of these mountains has its own story, but what they all share is the way they blend science and beauty, turning the Earth's past into something you can actually see.
Here are six such mountains from around the world that look like nature’s very own artwork.

In the dry region of Gansu province, the hills of Zhangye Danxia stand out with their bold streaks of red, orange, and grey. The colours come from sandstone and minerals that were deposited over millions of years, then exposed by natural erosion. Iron-rich layers bring the red tones, while other minerals add contrast. What’s most remarkable is how the landscape looks hand-drawn, with patterns so sharp they appear almost artificial, even though they’re completely natural.

High in Argentina’s Jujuy province, the Hornocal mountain range is known for its wide range of visible colours– often described as a palette of fourteen shades. The layers were formed from ancient limestone and other sediments that underwent mineral changes over time. Shifts in the Earth’s crust pushed these layers upward, turning what was once buried material into a multicoloured mountain face. Today, it’s one of the most visually unique ranges in South America.

Also known as Rainbow Mountain, Vinicunca in Peru has become one of the country’s most photographed sites in recent years. The colours– which include red, yellow, and green bands– are due to the oxidation of minerals like iron and copper. For centuries, this mountain was hidden beneath snow and glaciers. As the ice began to melt in recent decades, the colours were slowly revealed, drawing both scientists and tourists to study its formation and witness its changing appearance.

In the state of Oregon, the Painted Hills offer a quieter but no less fascinating example of natural colour layering. The hills are not tall, but they show distinct bands of red, black, and yellow, each representing different environmental eras. The red tones formed under warmer, wetter conditions, while the black comes from old plant material that turned into lignite. Unlike other colourful mountains, the shades here shift slightly depending on moisture levels.

In a small part of Mauritius, near the village of Chamarel, lies a section of rolling dunes that appear striped in shades of red, blue, yellow, and purple. These colours are the result of volcanic rock breaking down into mineral-rich sand. What puzzles scientists and amazes visitors is that the sands don’t blend– even after rain or wind, the colours tend to stay separated. It’s a rare geological feature, and one that has made this quiet site a major local attraction.

Not far from the Andes foothills, the town of Purmamarca is home to the Hill of Seven Colours– a compact but striking geological site in Argentina. The visible layers are a result of different minerals settling at various times in Earth’s past, some dating back hundreds of millions of years. Minerals like clay, sandstone, and copper oxides give the hill its mix of pink, green, and purple tones. Early morning and late evening light tend to bring out its best colours.