A popular hiking route is to King Ludwig II’s hunting lodge, Königshaus am Schachen (adult/concession/child €5/4/free), sometimes called Jagdschloss Schachen, which can be reached via the Partnachklamm in about a four-hour hike (10km). It's the least-visited of all Ludwig II's projects. A plain wooden hut from the outside, the interior is surprisingly magnificent; the Moorish Room is something straight out of Arabian Nights.
Note that entry tickets can be purchased in cash only. The nearby Schachenhaus hut has welcome refreshments and basic beds for the night (cash only).