Tour guides from Scotland recommend their favorite Caledonian experiences, from elegant Edinburgh to clan castles in the Highlands, and even budget getaways for backpackers. Then a pair of world travelers explain why they’ve settled down in Greece’s Nafplio, the picturesque Peloponnesian town that’s a getaway for big-city Athenians, a jumping-off point for history-rich sights nearby, and delightful in its own right.