National and Kapodistrian University of Athens (Greece):  http://en.uoa.gr/
Committee of Geosciences Didactics of the Geological Society of Greece:  http://geodidactics.weebly.com/home.html
University of Zaragoza (Spain) : http://wzar.unizar.es/servicios/ingles/prese.htm
University of Alcalá (Spain): https://portal.uah.es/portal/page/portal/portal_internacional/la_universidad/
University of Palermo (Italy): http://www.unipa.it/museogemmellaro/Museo_Gemmellaro/HomePage.html
Geopark Naturtejo (Castelo Branco, Portugal):  http://www.naturtejo.com/
Krahuletz-Museum (Eggenburg, Austria):  http://www.krahuletzmuseum.at/
Österreichische Geologische Gesellschaft:  http://www.geol-ges.at/veranstaltungen.html
The International Union of Geological Sciences (IUGS): http://www.iugs.org/
Unesco-Education-Natural Sciences: http://www.unesco.org/new/en/natural-sciences/
European Geosciences Union (EGU): http://www.egu.eu/
SCIENTIX: The community for science education in Europe: http://www.scientix.eu/web/guest/home
My school “voyages” with PERSEUS-PERSEUS@school: International school network: http://www.perseus-net.eu/en/schools_network/index.html