This house is an integral part of an 18C Georgian block, and has either kept or reproduced the original furniture and decoration, which were those of the widow who lived in it from 1794 to 1806. In the stone-floored kitchen there is a water filter, a sugar cone, a hastener and wooden vessels; in the hall a massive door lock; in the dining room a wine tank designed by Francis Johnston and dolls' houses in the nursery.

The current late 19C building incorporates part of the 13C building. Ancient tombs, a medieval stone font and stained-glass windows adorn the plain unplastered interior. Near the cathedral, from the top of the restored 30m high round tower, there is a vast panoramic view over the Curragh and the neighbouring counties. Opposite the cathedral, a small road leads to Saint Brigid's tomb and well.

Although the church was first built around the 12C, the current building was built in 1715 and remodelled in 1759. Its spire was dismantled in 1810 because it overlooked the castle's courtyard. A plaque commemorates John Field (1782-1837), the composer and creator of the Nocturne, who was born in Golden Lane and baptised in the church.

The Steam Museum is located in the old railway engineers' Gothic church.The Model Hall, decorated with portraits of inventors and famous engineers, holds the Richard Guinness Collection of over 20 prototype locomotive models from the late 18C. Four live steam stationary engines and one marine engine are displayed in the Power Hall.