Who can help me to find very modern gardens in Europe. I want to post these adresses on my homepage?

The main search words for what you are looking for are "Gartenarchitektur" (garden architecture) and "Naturgarten" (natural gardens) - at least for Germany. While garden architects have a more artificial approach, there are many gardeners who collect and grow (almost) forgotten (fruit)trees, herbs, flowers and whatnot to not only make gardens look pretty, but also to make it a good habitat for birds, insects and small animals.

http://www.ahornblatt-garten.de/ - click on "Gartenbilder" in the top bar to view examples which can also be mailed as postcards.

This is their contact page with phone number and mail address: http://www.ahornblatt-garten.de/kontakt.shtml

http://www.eneagarden.ch/ - a Swiss site which can be viewed in English too

http://www.gaertner-von-eden.de/gve/

http://www.garten-groene.de/ - site of a gardener and author of books about gardens

http://www.ogg.de/ -> click on "A. Osterloh's "Traumgärten" near the bottom, on the next page click on "fotos" in the top bar and start browsing...

General info: German sites are required by law to have their contact info displayed visibly somewhere on their web page. "Contact" is "Kontakt" in German, "Vorname" means "first name" and "Nachname" means "last name". Feel free to send the site owners a mail, and don't worry if you don't speak German - most Germans learn English at school. Those folks may not speak as much English as I do, but I'm certain that they will appreciate a nice mail from a foreigner, especially when they hear what it is all about.

I'll star your question to alert my network - I'm a German user, but I have Yahoo contacts all over the world from all walks of life. Maybe they have additional info...