Only a few hundred people at last year's Electric Picnic gained access to the most secret venue in the whole festival - BerlinHaus.
Its location was never fully revealed; nor did any footage, photographs or reports materialise. But it was there, and it will be there again.
For German techno aficionados, gaining access down a steep, dark tunnel into a clandestine subterranean club - in which only DJs from Berlin's infamous Berghain play - this should be on your list for the small hours.
So if, while wandering in the forest this year, you suddenly feel the ground vibrate underfoot with a thumping base beat, or catch a flicker of strobe emerge from an access cavity in the ground, or glimpse the dim neon that carries its name over the mossy abandoned bunker entrance - and if you can find you way past the selective Deutsche bouncer - you might suddenly find yourself in an subterranean East German safe house that has been commandeered.
Sometimes 4am is not bedtime.
All photography, video recording, and phone use is forbidden.
HIER GIBT ES NICHTS ZU SEHEN!