Photographer Cessna Kutz recently captured this beautiful ‘horizontal rainbow’ from her porch on Lake Sammamish.

The lake is located just outside of Seattle in Bellevue, Washington. The optical phenomenon is actually known as a circumhorizontal arc and occurs when the sun is higher than 58 degrees in the air and cirrus clouds are present.

The ice crystals found in cirrus clouds actually refract the sunlight, creating the ‘horizontal arc’ seen here. If you’re interested in prints, click here.