There are few things we love better than a designer boutique hotel. If that hotel happens to be in a castle — better yet! Okay, so we're fudging a little with this property. It's actually a Byzantine-era manor on the outskirts of the picturesque castle town of Monemvasia in the southern Peloponnese. But we're sure you'll agree that this fortress-like hillside property is truly regal. Showcasing Byzantine, Ottoman and Venetian architectural influences, the hotel has just 27 guest rooms and suites, all of which incorporate original details. The most notable is a suite in the old dungeon with five interlocking domed ceilings. The lounge can be found in the former olive oil press, and fine dining takes place in the central courtyard in season, with tables arranged on platforms above the ancient cistern that serves as the property's centerpiece. Kinsterna Spa takes full advantage of the hotel's water features, as does the swimming pool, which is fed by a stream that winds through centuries-old orange trees.