A 15th-century castle turned five-star hotel, sitting on a secluded lakeside estate at the foot of the Blue Stack Mountains. Fine dining at Cedars Restaurant, the CARA Organic Spa, outdoor hot tubs, and 124 rooms that manage to feel both grand and genuinely comfortable. If you’re looking to treat yourself during your time in Donegal, this is the place. About a 10-minute drive from The Diamond.