It is also found in similar artwork on Celtic crosses and slabs from the early Christian period. The fact that the triquetra rarely stood alone in medieval Celtic art has cast reasonable doubt on its use as a primary symbol of belief.
Namibia, the second-least densely populated country in the world is also one of the newest, and is home to some of the largest sand dunes, the darkest skies, the oldest cultures, the biggest conservation areas in Africa, the worldâs last rhinos and the most complex languages on the planet â to name but a few!
Colorado's Great Sand Dunes National Park, which contains the highest sand dunes in North America, provides stunning views in the shadow of the majestic Sangre de Cristo Mountains.inter snow curtails trips into the high mountains, though the dunes can still be visited. How to Visit. Stop at the visitor center for a quick lesson in the Great Sand Dunes environment, and to learn the schedule of ranger-led walks and programs (summer only). From there, proceed to the dunes parking lot.