Because fresh sand trickles evenly into the water, the stream does not find a stable and permanent river ... Sand Dunes ...

Behind you, the Colorado River is trenching a deep meander from ... It's hard to believe that a national monument girded by towering cliffs—their color burning through the spectrum as the ...

It was originally designated a national monument in 1932 to protect its dunes from gold mining and sand extraction for cement, but for millennia before the designation ... The valley is also located ...

There are so many things to do in Great Sand Dunes National Park and preserve ... There is a natural phenomenon in the Medano River on the sand called a surge flow. This is where the sand builds ...