Sunday morning, families are cheerfully wandering, by bike or on foot, elderly people do the same, sometimes at a nicer pace, in the largest forest of Berlin, Grunewald.

Letting the walkers go deeper into the forest, we amble on the main road when suddenly a wood panel tells us to take that direction (actually, we didn’t know which way was going to the top). Heading to the hilltop, we eventually arrived up: but not on the right hill…