At the border between the Czech Republic and Germany, south of Dresden, lie the Elbe Sandstone Mountains. This area is known for its amazing and often unique rock formations, as well as wild forest and rushing rivers.
The most popular part of this national park area is the Bastei cliffs, which have original fortifications along their heights and lofty catwalks for visitors. This is a great entry point into the towering sandstone pillars that have come to define the region, which is an internationally renowned rock climbing location. Free climbing is popular, but there are also the telltale steel rungs of via ferrata throughout the park; there are somewhere are 14,000(!) routes up and around the 1100 or so freestanding pinnacles in the park. So yeah, you've got options.
Hiking options also abound, although the Malerweg Trail may the best way to enjoy these sandstone wonders if you've got 5-7 days to tackle a moderately challenging 112 km (70 miles). There are plenty of small town accommodations and camping opportunities here if you're up for it.
Browse the included links for much more information on one of the most breathtaking corners of the German wilderness
Location:Saxon Switzerland National Park (near Dresden)
Note:On a plateau overlooking the Elbe River is one Europe's most massive fortifications, The Königstein Fortress, which consists of over 50 buildings and serves as an open-air museum on Saxony military history. This would undoubtedly round out a great day trip to the Elbe Sandstone Mountains.