14th century castle
Malahide is a small residential suburb in the north of Dublin. It has several notable Bed and Breakfasts, but the pest part is Malahide Castle. Built in the fourteenth century, the castle today actually serves as a gallery of the National Gallery in Dublin. It is worth visiting (if only from the outside) to enjoy the architecture and the large esplanade where you can relax on sunny days. You can reach Malahide by bus from Dublin in about 20 minutes.