Behind the gateway rise the ruins of the late Romanesque bergfried or keep, whose north wall still reaches a height of about 10 metres. The originally square main tower had sides 9.8 metres long. Only parts of the outer shell have survived; the wall being constructed of closely packed rusticated ashlars with narrow channels the remains of the infill being made of herringbone pattern bricks (Opus spicatum). The ashlars had to be set in place using the old lifting device, the three-legged lewis, however, so that the front face had no lifting marks. The raised entrance was on the south side facing the castle courtyard. At the foot of the tower a garderobe shaft indicates that the original neck ditch was located immediately in front of the bergfried. The main entrance of the Romanesque castle was probably in the vicinity of the present gate - a reconstruction by Joachim Zeune, a German medieval archaeologist - but was later moved to the south side. During the period of the Hussite attacks, this new gate was walled up and the surviving double tower gate built for security reasons on the uphill side. Past the ruins of the jointly inherited estate (a Ganerbentum) the castle courtyard features the remains of the palas in the southwest, the castle well and the Late Gothic castle chapel. The extensive vaulted cellars, some hewn out of the rock, were largely closed off during the restoration work for bat conservation reasons, and are only accessible on special occasions. The cellars under the palas and the above-ground vault of the Ganerben residence next to the bergfried are freely accessible. The castle ruins stand on very unstable subsoil. The massive Rhaetian sandstone rocks are sliding slowly down the castle hill and collapses still occur today. For example, in 1960, three vaults, placed one above the other over the old gateway, substantially collapsed. Two decades later the wall in the old gateway area also fell down. Its lower section, with the added gateway, has survived. Static stabilisation measures were taken in recent years. Since 2003 a circular walk has enabled visitors to walk around the whole of the inner ward and also previously inaccessible parts of the castle. The castle is a waystation on the Haßberge Castle Educational Path of the district of Haßberge. Chapel The ruined castle chapel on the eastern side of the castle was first built in 1438.