Iconic stadium unrecognisable with four-storey underground greenhouse

Real Madrid's Santiago Bernabeu has a four-storey underground greenhouse below the pitch

The iconic stadium's latest renovation work saw the capacity increase to 85,000

As part of the project, an extra tier was built alongside a 360 degree big screen and new look exterior

Although fans did compare the renovated ground to an AIR FRYER when the roof was closed for the recent clash with Manchester City

But another hidden detail has now been revealed with a state-of-the-art system maintaining the retractable playing surface

Pictures show the pitch stored in an underground greenhouse that provides ventilation, air conditioning and LED lighting

Incredibly, groundsmen can work on the pitch deep underground before raising it into the stadium for matchday.