Photographers flock to Death Valley's otherworldly landscape during sunrise and sunset, and these are the best places to see ...

I got my first lesson in the physics of sand dunes in 1998 on ... The wind on the dune crest had died down to a breeze. I took off at sunrise, running down the windward slope of the dune.

Sossusvlei is part of the Namib Desert, which is considered the world's oldest desert, dating back at least 55 million years.