Austria

The Stage of the World (Die Bühne der Welt).  Gorgeous photos of Salzburg and, if you go to virtualstage (bottom right), more Ecards, panoramic views both inside a baroque cathedral and outside of the whole city, and funny short videos of 'Mozart' waltzing through. [ul]
http://www.salzburginfo.at/#

The Spanish Riding School. The famous home of the Lipizzaners trained for dressage: the horses, the riders, the history of the school and schedule of events. Photo gallery too. In German. [ul]
http://www.srs.at/

The world's largest Ice Caves. A comprehensive site about these remarkable caves, with the history, maps and a guided tour through slide show. Don't miss the spectacular photos in the gallery. [ul]
http://www.eisriesenwelt.at/

Border Zone Europe. This site by Rolf Palmberg offers a number of great border photos, including photos of divided houses and borderlands, all over Europe. [ul]
http://www.vasa.abo.fi/users/rpalmber/borders.htm