Rub Al Khali can be translated from Arabic to mean "the Empty Quarter". Drive out into the desert from Abu Dhabi past the Liwa oasis and you'll find yourself in the largest area of continuous sand in the world. This vast, arid desert covers about 250,000 square miles and most of the Arabian Peninsula with dramatic undulating sand dunes and strange rock formations. The area is also home to the Bedu people, who are known for their warm hospitality, and you might see gazelles, oryx and sand cats. Tours out into the wilderness can be arranged from Abu Dhabi and a guide is essential.