Deep in Iceland's volcanic heartland lies a crater so vivid it seems painted by nature's own hand, where turquoise waters rest in a basin of red volcanic rock.

Welcome to Kerid Crater, one of Iceland's most visually stunning geological formations. Located along the Golden Circle route near Selfoss in South Iceland, this explosive crater tells a story that began thousands of years ago when the earth itself tore open.

Today, this natural amphitheater draws visitors from around the world who come to witness the striking contrast between rust-colored volcanic walls and the aquamarine lake that fills its floor.

A Violent Birth

Kerid was born between 6,500 and 9,000 years ago in a explosive volcanic event that geologists classify as a maar eruption. The crater is the northernmost of four volcanic craters that formed along an 800-meter fissure called the Tjarnarhólar crater row.

As Iceland moved over a localized hotspot in the Western Volcanic Zone, the explosion created this elliptical basin measuring 55 meters deep, 170 meters wide, and 270 meters across. Unlike many crater lakes that formed from collapsed magma chambers, Kerid's distinctive shape remains remarkably intact, making it one of the most recognizable volcanic features in the region.

Natural Exhibits

The crater itself is the main attraction, with walls composed of striking red volcanic rock formed from cooled lava and scoria. The colors shift throughout the day as sunlight plays across the mineral-rich surfaces.

The lake at the crater's base reaches depths of 6 to 14 meters depending on rainfall levels. Its distinctive turquoise color comes from minerals leaching from the surrounding soil. Scientists have identified 10 taxa of zooplankton thriving in these mineral-rich waters, primarily from the rotifer phylum, creating a hidden microscopic ecosystem within this geological showcase.

Walking the Rim

What sets Kerid apart from other Icelandic craters is its accessibility and near-perfect preservation. Three walls rise steeply with sparse vegetation clinging to the volcanic rock, while one gentler slope is blanketed in deep, cushioning moss that visitors can descend.

The site offers a complete rim walk, providing 360-degree views that change with every step. In winter, the lake freezes into a pale blue-white expanse, while summer brings out the full intensity of the water's aquamarine hues. The natural acoustics within the crater walls have even made it a venue for outdoor concerts.

Kerid Crater Highlights & Tips

• The Turquoise Lake The mineral-rich water creates an otherworldly aquamarine color that contrasts beautifully with the red volcanic rock walls.
• Rim Walk Circle the entire crater on a well-maintained path for changing perspectives and photo opportunities at every turn.
• The Moss Wall One gently sloped wall covered in deep green moss provides a descent path to the lake level for closer views.
• Golden Circle Stop Kerid is conveniently located along the Golden Circle route, making it easy to combine with visits to Thingvellir and Geysir.
• Seasonal Colors Visit in summer for the most vibrant water colors, or winter to see the frozen lake. Each season offers dramatically different views.
• Entry Fee Required The privately-owned site charges 600 Icelandic krona for entry (as of 2025). Have payment ready at the entrance.
• Photography Golden Hours Early morning or late afternoon light enhances the red rock colors. The crater faces various directions, so light changes throughout the day.
• Weather Preparation The rim walk is exposed to wind and weather. Dress in layers and bring waterproof gear, especially in shoulder seasons.

Kerid Crater offers something increasingly rare in our modern world: a chance to stand at the edge of geological violence frozen in time. Whether you're circling the rim, descending the moss-covered slope, or simply sitting quietly to absorb the surreal color palette, this volcanic wonder connects you to Iceland's explosive past.

As part of the Western Volcanic Zone, Kerid reminds us that the earth beneath our feet remains dynamic and alive. It's a place where science and beauty converge in ways that words and photographs can only partially capture.