Hardest venue for visiting team to win at?

This weekend England will play New Zealand (The All Blacks) at Aucklands Eden Park They (The All Blacks) haven't lost a game at Eden Park since 1994, that is 48 Consecutive victories for the home team. Since 1908 they've played 96 times at Eden Park and won 82 times with 11 losses and 3 draws.

My question, has there be a more difficult place for a visiting team to win at over the past 50 or 100 years?