Isenburg is a ruined castle located high above the valley of the Zwickauer Mulde. Archaeological finds indicate that this site already existed in the 12th century. Little is known about the history of spur castle and its violent destruction. There are no verified, documented references. Oral traditions - the first account dates to 1738 - called the Isenburg a 'robber castle,' the 'Old Castle' and the 'Iron Castle', from which its present name is derived. The castle had been destroyed by the 14th century and was never rebuilt. Its ruins were probably used from the 15th to 17th centuries as shelters for the local population during times of conflict. Around 1750, the remains of the castle were demolished to build the stone church in Wildbach.
The recommended way to visit the castle ruins is by foot from Hartenstein railway station which takes about 30 minutes. Only about 200 metres from the station is Stein Castle. At this spot the route crosses the Zwickauer Mulde river to a point immediately below Schloss Wolfsbrunn. Here the route turns left and winds through the Poppenwald upstream and parallel to the Mulde. After a short, but steep, climb known as 'Gentle Henry' (Sanfter Heinrich), the path forks. Keeping right, the route passes the Wildbach Church on an easy forest path. Here there are signs to the ruins which are another 700 metres further on.
The left-hand fork leads via a wild and romantic narrow path on top of the river bank of the Mulde to the same destination. This path is called the 'Raubrittersteig' ('Robber Baron Climb') and is one of the most attractive walks in the Mulde Valley.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.