Grindelwald and the north face of the Eiger are not far apart. Both are beautiful and well worth a visit. But it is one thing to hike around Grindelwald and quite another to climb the Eiger north face.
Both projects require planning. The hike only requires suitable footwear and, if necessary, hiking sticks. The climbing section on the north face of the Eiger, on the other hand, requires solid climbing experience and much more extensive equipment, such as ropes, helmets, crampons, carabiners, etc.