There were two Schauenburg castles near Frenkendorf, Alt (or Old)-Schauenburg about 1 km (0.62 mi) southwest of the village on the top of Chleiflüeli hill and Neu (or New)-Schauenburg to the west.

[2] By 1480 a group of Beguines lay sisters had occupied the towers of Neu-Schauenburg and established a cloistered house in the ruins.

In 1691 mineral springs were discovered and a bath house was built near the castle ruins.

It has an irregular floorplan and a gate on the north side with a 2 m (6.6 ft) thick castle wall that follows the edge of the spur.

The top of the spur is divided down the center by a narrow band of rock into higher eastern and lower western halves.