Johnstown Castle

[9] By 1863, the demesne was divided in two, with a deer park in the north and the castle, pleasure grounds, farm and two artificial lakes to the south.

During the First World War, Royal Naval Air Service airships were based at Johnstown Castle, and were primarily used to deal with the U-boat threat, but with limited success.

On 1 May 1944, the contents of the castle were sold off at a public auction lasting five days and conducted by Jackson Stops & McCabe.

It is managed by the Irish Heritage Trust under curator Matt Wheeler, and work on conserving and restoring the building continues.

[citation needed] A servants' tunnel, 86 metres (282 ft) in length, runs from the meat house to the kitchens.

A four-sided tower made of weathered stone bricks, featureless except for a few slot windows, an arched entryway, and a simple turreted rooftop. The tower is 12-15 meters high (~40-50 feet). The walls are covered in ivy, moss, and lichen. The tower is surrounded by overgrown vegetation.
Rathlannon Tower House, built by the Norman Esmonde family, likely during the 15th century. The tower is located on the grounds of Johnstown Castle, southwest of the newer main castle.
The castle c. 1860–83 with garden and Victorian gentleman (presumably one of the Grogan-Morgans) in the foreground.