Blue Pond in Biei, Hokkaido, Japan
© JTB Photo/UIG/Getty Images
Blue Pond in Biei, Hokkaido, Japan
Scientists aren’t exactly sure what causes the vibrant colour in Hokkaido’s Blue Pond. The water itself is not unusual and appears clear. But at different angles, times of day, and depending on the light and distance, the water of this small pond near Daisetsuzan National Park can look electric blue or turquoise. The current theory centres on the relatively high concentration of aluminium hydroxide in the sediment at the bottom of the pond, which can reflect light in a bright blue colour.
Related Images
Crocus flowers
A baobab grove near Bandia Wildlife Reserve in Senegal
Grapes on the vine in Mendoza, Argentina, for the National Grape Harvest Festival
Circular agricultural fields in Morgan County, Colorado, USA
Grey wolf with flock of ravens in Finland
A musical note in the garden of Anne Hathaway's Cottage, Stratford-upon-Avon
Meditation domes at the Beatles Ashram in Rishikesh, India
Lake Dobson in Mount Field National Park of Tasmania, Australia
Bing Today Images
Pink dahlia flower
Jul 23, 2026
Methoni Castle, Messinia, Greece
Jul 23, 2024
Edinburgh Tea Estate, Nuwara Eliya, Sri Lanka
Jul 23, 2023
Elephant hawk-moth on foxglove flower
Jul 23, 2022
Tokyo Tower in Minato City, Tokyo, Japan
Jul 23, 2021
The Skywalk on the Rock of Gibraltar
Jul 23, 2019
