Glenveagh is the second largest national park in Ireland. The park covers 170 square kilometres of hillside above Glenveagh Castle on the shore of Lough Veagh (Loch Ghleann Bheatha), 20 km from Gweedore in County Donegal. The network of mainly informal gardens displays a multitude of exotic and delicate plants from as far afield as Chile, Madeira and Tasmania, all sheltered by windbreaks of pine trees and ornamental rhododendrons.
The estate was established by John Adair, who became infamous for evicting 244 of his tenants and clearing the land so they would not spoil his view of the landscape. The gardens and castle were presented to the Irish nation in 1981 by Henry P. McIlhenny of Philadelphia who had purchased the estate in 1937.