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 color 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 centers on the relatively high concentration of aluminum hydroxide in the sediment at the bottom of the pond, which can reflect light in a bright blue color.
Related Images
Lake Dobson in Mount Field National Park of Tasmania
The Cove of Spires in Kenai Fjords National Park near Seward, Alaska
Bath, Somerset, England
An old farm in the Shetland Islands, Scotland
Cannes, France, where the annual film festival begins today
Pine Log State Forest, Florida
Bioluminescent algae along the shores of the Matsu Islands off the coast of Taiwan
Path to San Juan de Gaztelugatxe, Basque Country, Spain, for the 'Game of Thrones' premiere
Bing Today Images
Pink dahlia flower
Jul 23, 2026
Vatican City with St. Peter's Basilica
Jul 23, 2025
Methoni Castle, Messenia, 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
