Lilies of the valley and ivy-covered ash, oak, and beech trees line the driveway leading from the village of Glin to this gleaming-white castle, home to the knights of Glin for the past 700 years. The vast estate sprawls over 160 hectares (395 acres) of sloping lawns, gardens, farmlands, and forests. The centerpiece of it all is, naturally, the castle -- which is really a Georgian house with Gothic details. The castle operated as a hotel until 2009, when, to our great dismay, it closed as a result of the recession (although you can still book overnight stays as a group of at least six). The building itself is not normally open to the public, but visits can be arranged; call ahead for details.