The Green Man is a tavern that was located in London.
The tavern was set up some time in the Medieval era in a small town.
The tavern survived into the 21st century and it was Medieval themed. When knight Sir William de Mornay chased a Dracorex through an anomaly to the present, he arrived at the tavern which he remembered from the town. He caused havoc when he found a tattoo on the neck of the biker Brian, reading "666" - the number of the Devil. Danny Quinn and Connor Templefrom the Anomaly Research Centre caught up with him there in an attempt to bring him back to his own time. (Episode 3.7)