Dunglass Castle, situated in West Dunbartonshire, is a ruinous castle, originally constructed during 1400–1542. A large section of high wall remains, to approximately 7–8 metres high, with a mixture of original and newer construction. A small conical dovecot also exists on the south wall but it is now completely ruined. The castle and courtyard stone was taken in 1735 to use in repair of the quay following an order by the Commissioners of Supply.
Near the west end of the wall, and outside the south wall is a small landing place appearing to have been protected by a hoarding – some corbels for which still remains. At the North-West corner of the enclosure is a dwelling house, partly old, possibly dating back to 1590, but mostly modern – the interior is wholly so. The round tower is probably from the 17th century and appears to have been a pigeon house.
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Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.