Heidelberg is located on the banks of the Neckar River. Here, the Neckar River flows from the narrow and steep Odenwald valley to the Rhine Valley and meets the Rhine River in Mannheim, 20 km northwest of Heidelberg. The famous Heidelberg Castle is situated on a hill 200 metres above sea level above the Neckar River, overlooking the narrow old town of Heidelberg. It may be that the viking is too comfortable, and it may be that the scenery in Heidelberg is so beautiful. Every day, it depends on the mountains and waters, so it is delicious.