Between Lough Rynn and Lough Errew, 21km southeast of Carrick-on-Shannon, this magnificent early-19th-century property sits amid 120 hectares with nature trails and a walled garden. Antique-filled rooms have underfloor heating; 16 are located in the former manager's residence, while 28 are in the castle itself, including two sumptuous suites – one with a Jacuzzi and private crenellated roof terrace.
Local produce stars at its stone-walled restaurant, serving lunch as well as four-course evening menus (€65). At the bottom of a staircase, a secret door leads to the fabulously atmospheric dungeon bar.