Arabia Felix…some call it the Yemen–but, why felix? Because it gets rainfall…it is happy. But it is the Empty Quarter, the Rub al Khali, the arid, tropical sand desert that is the true enigma.

There is no Arabia Felix without the Rub Al Khali.

Straddling the Tropic of Cancer and, known in English as The Empty Quarter, the world’s largest contiguous sand desert…has always been, and still is, for humans…an enigma…throughout millennia…a massive natural and cultural enigma.