• Closed in bad weather: the upper castle and museum shut in ice, snow or storms, and the lower castle paths are not cleared in winter
• Tickets at the gate only, since there is no online sale, while the lower castle is free to walk in any day
• Uphill walk from the train: the signed footpath from Haagen/Messe station takes about 30 minutes, and parking fills at busy times

Rötteln is one of the largest castle ruins in southern Baden, stretching about 300 meters along a hilltop spur above Lörrach. Kids can climb both keeps for views over the corner where Germany, Switzerland and France meet, roam the walls and courtyards, and see the small castle museum with its fairy-tale organ and weapons display. Behind the castle, a grill area has a well-known climbing root.