To give you an impression about the GRD please take a look at the first GRD, organised in June 2016. All of the pictures taken on the 26th of June, 2017 can be found here.
25 January 2018: Bas Alferink
29 June 2017: Sari Seftiani
19 January 2017: Marten Hoekstra
16 June 2016: Maarten van der Leck