Worst I ever saw was also in Zurich, we landed CAT III B with 75m all the way down the runway. We landed, exited the Runway, couldn't make out any of the taxiways so asked for the follow me car to come out........ he couldn't find us
Sat there for around 15 minutes until we finally saw the follow me car and made our way to the stand.
Second worst was in Guernsey, I was down for 4 days of flying and had all 4 days cancelled due to 'sea fog', funny thing was the airport wind was gusting 20kts. The company tried to get me home by catching the ferry to Jersey, but they were cancelled due to the fog also. I thought I might try and get a round of golf in, but couldn't see the fairways from the tees, so all and all a bad week.