Pompeii's ancient drains are STILL in working order and will be used again to empty rainwater into the sea 2,300 years after they were built

Since 2018, the 1,500ft (457m) network of tunnels (pictured), which are big enough for a human to fit into, have been carefully assessed

The 1,500ft long network of tunnels empties rainwater into the nearby sea  
It was built in three phases dating back as far as 3rd century BC by the Samnites 
Romans updated the network of tunnels and it is still in excellent condition  
Spans from the Pompeii Forum underneath Via Marina and to the Imperial Villa 

Pompeii's ancient drainage system is in such good condition that it is set to be put back into active service, despite being built almost 2,300 years ago. 

A 1,500ft stretch of tunnels underneath some of the famed Italian city's most iconic structures was originally built to drain water downhill away from Pompeii's centre. 

Analysis of the tunnels revealed they had been almost untouched for millennia and the complex system is still in excellent condition. 

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