10 delicately balanced rocks that defy gravity

Ténéré desert rock
Steady as a rock. But not for much longer...
© National Geographic Creative
One of the world's lesser known deserts, the Ténéré comprises a vast stretch of the Sahara – some 400,000 square kilometres – from northeastern Niger into western Chad. It's also one of the most inhospitable, where daytime temperatures can reach 42ºC.
Hot, dusty winds known as the harmattan blow year round and are partly responsible for helping to create unique rock features such as these.
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