Earth Day Apr 22, 2025

Earth Day

On Earth Day, let"s journey to one of nature"s most stunning displays of geothermal power—Grand Prismatic Spring in Yellowstone National Park, Wyoming. The largest hot spring in the US, it spans 370 feet across and reaches temperatures of 160°F. This geothermal marvel is fueled by the immense heat of the massive Yellowstone volcano beneath the surface. Its vivid rings of blue, green, yellow, and orange are created by heat-loving microorganisms—called thermophiles—that thrive in the mineral-rich waters.

© Ajith Kumar/Getty Images

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Today in History

Apr 22, 2018Have a ‘beary’ good Earth Day
Apr 22, 2019Meet our fuzzy Earth Day mascot
Apr 22, 202050 years of Earth Day
Apr 22, 2021Gazing down on planet Earth
Apr 22, 2023Earth Day and National Park Week
Apr 22, 2024Earth Day

More Desktop Wallpapers:

Feb 12, 2019To Roswell, and beyond!
Aug 19, 2020Freeze frame
May 21, 2023Pont dArcole over the Seine river, Paris, France
Aug 18, 2022Surströmming Day
Dec 2, 2022Alaska National Interest Lands Conservation Act marks 42 years
Jun 19, 2025Happy Juneteenth!
Jul 23, 2019A state-of-the-art lookout on the Rock of Gibraltar
May 6, 2020The (Inca) empire strikes back
Aug 1, 2020Where fire meets water
Aug 29, 2024Castellfollit de la Roca, Catalonia, Spain
Feb 1, 2023Black History Month
Jul 31, 2020The Big Blue of the Sierra
Feb 6, 2019Watch your step
Jul 30, 2020International Day of Friendship
Mar 15, 2021Every day is Napping Day for this screech owl
Feb 9, 2020Hollywood s big night
Sep 26, 2023Venice Skatepark, Los Angeles, California
Apr 15, 2022World Art Day
Jul 20, 2022National Moon Day
Nov 10, 2019Sunny day, sweepin the clouds away
Sep 10, 2019Welcome to my neck of the woods
Aug 2, 2020Bellissima!
Dec 18, 2018A hit ballet, long after its debut
Oct 6, 2023Taughannock Falls State Park
Sep 20, 2025Oktoberfest begins!
Jul 12, 2018Provence blooms with lavender at Sénanque Abbey
Jan 31, 2020Dance of the egret
Aug 25, 2022National Park Service Founders Day
Oct 24, 202075 years of the United Nations
Feb 8, 2024Mount Hood, Oregon