SWNS / Hashem Al-Ghaili

Forget brief trips to space – a nuclear-powered flying hotel promises to keep your head permanently in the clouds.

The high-flying Sky Cruise concept sees a gigantic airplane able to be constantly airborne – with up to 5,000 guests arriving by passenger planes that dock with it.

With a small nuclear reaction powering the engines, the vehicle would be able to stay in flight for several years at a time.