Charlton friendlies: Lyngby (Copenhagen), Valencia, Germinal Beerschot (Antwerp), Utrecht, Roda (Kerkrade, Holland)
Domestic cup finals: Laugevallur Reykjavik, Olympic Stadium Stockholm, RDS Dublin
World Cup: Gelsenkirchen (Schalke), Munich (Allianz, also for Bayern v St Pauli)
Euros: Geneva
Domestic: Turners Cross (Cork), Millennium Stadium Cardiff, HK Helsinki, Hammarby reserve stadium Stockholm
Amsterdam Arena in August 1998. Ajax 11 against I can't remember, in an exhibition match.
Unique at the time in having a retractable roof for a club football ground.
Wales - Cardiff for the 2004 play off final.
Scotland - many including
Ibrox, 20 years ago, a few times (was well ahead of its time and vast), and others such as
Albion Rovers in Coatbridge - average crowd 250 at the time, the lowest in Britain every year
Airdrieonians
Alloa
Some of these victorian grounds have been replaced by out of town lego stadia since.