Königstein Fortress occupies the flat top of a sandstone mesa that rises 240 metres above the Elbe valley, about 30km southeast of Pirna. The site has been fortified since the 13th century; the current complex is a layered accumulation of medieval walls, Renaissance bastions, Baroque storehouses, and 19th-century additions — the largest hilltop fortress in Germany by area, with over 50 buildings within the walls. Walking the full circuit of the ramparts takes about an hour, and the views in every direction over the Elbe valley and the Saxon Switzerland landscape are exceptional.
The fortress is reached by a steep path from the village of Königstein below, or by a small lift cut into the rock. The interior includes a deep well (152.5 metres, one of the deepest in the world), a Baroque baroque and several exhibition spaces covering the fortress's military and political history. An S-Bahn train runs from Pirna to Königstein station; from there it's a 20-minute walk uphill to the entrance. Allow at least two hours; three is more comfortable.