Box Canyon Springs (Thousand Springs State Park, ID)

When approaching one of the many canyons of southwest Idaho, it is easy to have doubts: can such a feature even be possible amid all these flat plains? The crop fields of the Snake River Basin could pass, after all, for the vast lowlands of Kansas or Nebraska. Yet suddenly there it is: heading south …

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Caves Trail (Craters of the Moon National Monument, ID)

Following a volcanic eruption, underground lava tubes serve as thoroughfares for draining molten lava. When the lava cools and remaining flows drain out of the tubes, the subterranean passageways remain, leaving behind caves to explore. There are several spots in the United States to see lava tubes, including Lava Beds National Monument in northern California, …

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Inferno Cone (Craters of the Moon National Monument, ID)

“A weird and scenic landscape, peculiar to itself” is how President Calvin Coolidge described the volcanic, lunar-like landscape in south-central Idaho when he created Craters of the Moon National Monument in 1924. In the years before the designation, hearty explorers and geologists had crisscrossed and documented the unique volcanic features of the area, discovering a …

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Bradley Lake, Taggart Lake, and Beaver Creek Trail Loop (Grand Teton National Park, WY)

As glaciers carved the various canyons of Grand Teton National Park, they pushed enormous heaps of rocky debris down to the base of the sharp peaks, forming what geologists and climatologists today call moraines. In the centuries—millennia—that passed, the retreating glaciers left behind still, blue lakes, and vibrant evergreen forests and meadows blanketed the moraines, …

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