Eduroam (education roaming) is the secure, world-wide roaming access service developed for the international research and education community. Eduroam allows students, researchers and staff from participating institutions to obtain Internet connectivity across campus and when visiting other participating institutions by simply opening their laptop.
Eduroam has evolved into a federation of federations, or confederation, that requires coordination of the activity between federations. For full details of the eduroam service available at a particular organization overseas you need to visit the web site of the organization. Click on the relevant link below and from the country name on the map (Europe) or the list of NRENs below the map (Asia-Pacific), navigate to the national NREN eduroam site and from thence to their maps and links to the places you plan to visit.
The European eduroam locations map is a zoomable Google-maps view of Europe. You can zoom in to particular coutries and specific organisations and obtain the basic address and connectivity information.