On-Shannon is the second smallest chapel in the world. It was built in the nineteenth century by Costello in memory of his wife. Husband and wife now rest side by side in the beautiful memorial. The Sliabh an Iarainn Visitor Centre provides an audio-visual display reflecting life, transport and industry between Arigna and the Sliabh an Iarainn mountains.
Special emphasis is placed on the railway, canal, lakes, iron and coal mining.
Formerly the home of the Earls of Leitrim, the Lough Rynn estate is an intricate mingling of land and water. At over a hectare in size it's one of the largest in the country. Originally laid out as a vegetable garden it has been extensively replanted in the manner of a Victorian pleasure garden. This impressive manor house sits on the shores of one of Ireland's most beautiful lakes, Lough Gill. Once an important stronghold of the local O'Rourke family, rulers of Breffni, Parkes Castle has been recently restored to its true seventeenth century style.