If Decanter magazine is wine porn. The Cellars at Niepoort are the red light district.

The south bank of Porto is everything you'd expect a great wine trading port to be and the earthenware floors of the Niepoort cellars are as bewitching as any gothic movie set.

Despite having a hangover that meant hourly changes of underwear for Cameraman, we made our way into the dank, dark cellars; a place where very few are allowed to go.

The air is thick with port - there's a sweet, almost treacle-like quality to the air - where demijohns, bottles, barrels, and casks sit fermenting.

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