Toledo, high above the Tagus River in central Spain, is a city where layers of history are visible around every corner. For centuries it was an important Roman settlement, a Visigothic capital, and later a stronghold during the medieval Christian reconquest, before becoming the seat of royal power and a crossroads of cultures. Because of this long span of stories and architectural richness, the whole old town has been recognized as a UNESCO World Heritage Site.

Hong Kong is one of the few places in the world where a 700-year-old fishing village sits minutes away from the headquarters of international banks. Once a British colony and now a Special Administrative Region of China, the city carries traces of Cantonese, colonial, and global influences in its streets, rituals, and food. The city has more than 300 hiking trails, including the well-known Lion Rock hike, which ends at a dramatic cliff overlooking Kowloon’s dense skyline.

Cagliari is Sardinia's capital and largest city. Several civilizations have left their imprint here architecturally and culturally. Must-sees include the Museo Archeologico Nazionale di Cagliari, with its Roman and Byzantine treasures, as well as Castello, a medieval quarter situated on a hill above the city. The city is also known for its food and vibrant nightlife.

Bar Harbor should be any traveler's Maine priority! Drink in a view of the Atlantic Ocean from the town pier, and be sure to get some lobster at one of the excellent local restaurants. Bar Harbor, a Mount Desert Island town, is also the portal to the rugged, recreational paradise Acadia National Park, where birding, whale-watching and kayaking is the order of the day. The park's Cadillac Mountain is the highest point on America's East Coast.

Set on the River Seine, Rouen is Normandy's capital and a breathtaking city steeped in history, art, and romance. Marvel at the exquisite Gothic architecture of the Palais de Justice, l'Église Saint-Maclou, l'Abbatiale Saint-Ouen, and the Cathédrale Notre-Dame de Rouen.