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!
This dune field is very dynamic, with the most active dunes moving to the northeast at a rate of up to 30 feet per year, while the more stable areas of sand move very little. White Sands National Monument. The largest gypsum dune field in the world is located at White Sands National Monument in south-central New Mexico.