The Berchtesgaden Alps is one of the highest areas in Germany. Around the pitturesque Königsee rise the bare jagged mountains, as pimples out of the green woods and meadows. Watzmann is the highest mountain here (2.713 m), just a little lower than the Zugspitze, but 100% German.
This part of the Northern Limestone Alps intrudes into Austrian territory, more or less like a bag. The area is not far from Salzburg. The Berchtesgadener Alps continue on the Austrian side of the border, and the highest summit here is the Hochkönig, 2.941 m.
One of the attractions is the Steinernes Meer, the stony sea, a barren plateau with rocks, rocks, rocks.
Yes, walking is excellent here. Not only because of the many (more than 40) huts. But also because of the variety of trails, from easy to very challenging. The geological origin of the mountains is karst, and this means lots of hard rock and ... klettersteige, if you like them. Bonus is the relative calmness on the Austrian side, since the masses are draw to the areas with the big names, further south.