This giant sand dune in southern Spain is about 98 feet high and 656 feet wide, making it one of Europe's largest sand dunes. What is perhaps even more fascinating is what hides beneath it.

Sand Dune Arch heads into the towering red rocks to your right ... Plus, if you’re someone who wants a big payoff for little work or hiking, you can do much worse than this hike, which offers ...

It was made at dawn when the warm light of the morning sun was illuminating a huge red sand dune dotted with white grasses while the white floor of the clay pan was still in shade. It looks blue ...