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
For Waitangi Day, the Pancake Rocks on New Zealand’s South Island
Icicles on Lake Superior, Thunder Bay, Ont.
Cumulus clouds over the Caribbean
An old farm in the Shetland Islands, Scotland
Boathouse on Lake Minnewanka in Banff National Park, Alberta
Hong Kong-Zhuhai-Macau Bridge, China
Emperor penguins in the Ross Sea, Antarctica
Lake Dobson in Mount Field National Park of Tasmania
Bing Today Images
Pink dahlia flower
Jul 23, 2026
Methoni Castle, Messenia, Greece
Jul 23, 2024
Elephant hawk-moth on foxglove flower
Jul 23, 2022
Tokyo Tower in Minato City, Tokyo, Japan
Jul 23, 2021
The Skywalk on Rock of Gibraltar
Jul 23, 2019
