Hello,
Amongst other tools, it uses Google Tour Creator.
By the way, the website
Teach with Europeana contains many inspirational learning scenarios for all years and subjects, proposed by European teachers.
If you don't know
Europeana yet, it is an initiative of the European Union, as a digital cultural heritage platform. It currently provides access to around 57 million digitised items from more than 3500 European libraries, museums, archives and galleries.
Kind regards from Brussels,
François