Get ready to lace up your hiking boots, because National Park Week is upon us! Across the country, America's most stunning landscapes throw their gates wide open, inviting everyone to embrace the great outdoors for free. Throughout the celebration, various programs will be organized by the National Park Service, including ranger-led tours, volunteer opportunities, and educational workshops.

If you are in Wyoming, you might want to visit Yellowstone, the world's first national park. Established in 1872 by President Ulysses S. Grant, the park is known for its flora, fauna—including Rocky Mountain wolves, and grizzly and black bears—supervolcano, and many geothermal features, including the one we see in today's image. The Grand Prismatic Spring is in the Midway Geyser Basin. Its display of colors is caused by multi-layered sheets of microorganisms, ranging from deep blues and greens to fiery oranges and reds. There is so much waiting to be explored out there, so gather your friends and get out into the wild.