日出时分的大棱镜泉，美国怀俄明州黄石国家公园 Grand Prismatic Spring at sunrise, Yellowstone National Park, Wyoming (© XIN WANG/Getty Images)

日出时分的大棱镜泉，美国怀俄明州黄石国家公园 Grand Prismatic Spring at sunrise, Yellowstone National Park, Wyoming (© XIN WANG/Getty Images)

保存，保护，享受！ Preserve, protect, enjoy!

国家公园周开幕

准备好你的登山靴吧，因为美国国家公园周到了！美国各地最迷人的风景区已敞开大门，邀请大家免费拥抱大自然。在整个庆祝活动期间，美国国家公园管理局将组织各种活动，包括由护林员带领的参观活动、志愿者活动和教育研讨会。

如果你在怀俄明州，您可能想去黄石国家公园看看。作为世界上第一个国家公园，该公园以其植物群、动物群（包括落基山狼、灰熊和黑熊）、超级火山和许多地热景观而闻名，而今天的图片上的大棱镜泉正是其中之一。位于中间歇泉盆地的大棱镜泉从里向外呈现出蓝、绿、黄、橙、红等不同颜色，这种现象是由水体中生活的藻类和含色素的细菌等微生物造成的。外面有太多的东西等着你去探索，所以快召集你的朋友，到野外去吧。

National Park Week begins

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.