Yellowstone supervolcano ’s last eruption covered most of what is now the USA in volcanic ash and lava that flowed for ...

As beautiful as it might look, its rainbow-like appearance is largely ... produce different colors on the surface. Many of Yellowstone's hot springs have a multicolored appearance but this is ...

The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of ... feet in size and around 121 feet deep, its rainbow waters are what really make it fascinating.

There’s so much to see and do in Yellowstone that it’s hard to know where to even begin! Not to worry, I’ve put together all ...

From the thermal waters of Yellowstone to Glenwood Springs, discover the natural wonders of the best hot springs in America ...

Some of the largest volcanic eruptions on the planet have occurred at Yellowstone National Park, and scientists have ...

New mapping of the magma lying beneath Yellowstone National Park sheds light on where volcanic activity is shifting, and the ...

Mammoth Hot Springs has no set hours and access is covered by Yellowstone's seven-day admission fee ($35 per vehicle). Free parking is provided on-site. For more information about Mammoth Hot ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...

The giant supervolcano that lies under Yellowstone National Park is cooling off in the west but staying hot in the northeast.

Round-trip tours also depart from Mammoth Hot Springs (from $134). The only hotel in the park’s interior open during winter, the Snow Lodge sits in Yellowstone’s Upper Geyser Basin ...

For now, Yellowstone's mud pots will keep boiling, the hot springs will keep steaming, the geysers will keep spraying, the Earth will keep shaking and the fumaroles will keep venting. The massive ...