According to Manchester Unitedâ€™s veteran midfielder, even the more mediocre Liverpool teams he has gone up against have been difficult to overcome when backed by the fearsome home support.
The Welshman said: "It doesnâ€™t matter how the teams are doing in the league, thereâ€™s always that rivalry and thereâ€™s always that ferocious tempo within the game, whether it be at Old Trafford or Anfield."
Asked which stadium has the most daunting atmosphere, Giggs added: "I think Anfield. Like I said before, no matter how the teams are doing there is always a great atmosphere.
"You could be playing against an average Liverpool team and it would still be one of the toughest games of the season, just because the crowd drive them on and the tradition between the two clubs."