Star dunes - sometimes called pyramid dunes - stand out among sand dunes for their towering height and eye-catching form.

There are two creeks at Great Sand Dunes. Medano Creek is closest to the Visitor Center and the most popular with visitors. Depending on the conditions, visitors can surf, wade, raft, or just dip ...

Unlike the tallest freestanding dunes in North America, the St. Anthony Sand Dunes permit flying down ... Many locals and visitors may take a dip in Egin Lakes as a way to cool off after a morning ...

This story appears in the November 2012 issue of National Geographic magazine. I got my first lesson in the physics of sand dunes in 1998 on an expedition into the Sahara. In order to take aerial ...

Behind many of these beaches are sand dune systems which provide homes for diverse forms of wildlife including plants and insects, some so highly specialised that without these dune habitats ...

For fine-grained sand the threshold wind velocity ... tabular cross-strata with a uniform dip direction parallel to the dominate wind direction as the dune migrates downwind (Photos 1 and 2).

Huge volumes of sand have been swept offshore by Cyclone Alfred’s waves, leaving beaches and dunes looking very different.

While droves of vacationers flock to beaches overlooking the Pacific and the Atlantic oceans, inland residents enjoy Michigan's rolling sand dunes, ocean-like shoreline and sweeping vistas.