Did you know that in the heart of the Sahara Desert lies the remains of a mysterious Roman city? For centuries, different experts have tried to uncover the secrets of the ancient city that were swallowed up by the deserts, and buried under the sands of time.

Source: PostFun

The ancient Roman city is Timgad. Some time ago, it was a thriving city as the southern stronghold of the Roman Empire. But one day, its Roman inhabitants seemed to just abandon the city. What could have caused its citizens to pack up and leave?