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.

Nestled between Switzerland and Austria, Vaduz, the capital of Liechtenstein, is a charming alpine destination with a blend of modern culture and medieval history. Overlooked by the stunning Vaduz Castle, the official residence of the reigning prince, this small yet vibrant city offers breathtaking views of the Rhine Valley and surrounding mountains

Ronda, perched high above the El Tajo gorge in southern Spain’s Málaga province, offers one of the most dramatic landscapes in Andalusia. The city is split in two by a 120-meter-deep canyon carved by the Guadalevín River, and connected by the iconic Puente Nuevo, an 18th-century stone bridge that took over 40 years to complete. Visitors crossing the bridge can stop at the viewpoint built into the stone itself, once used as a prison.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

Rousse, Bulgaria, often referred to as "Little Vienna," sits gracefully on the banks of the Danube River. Known for its rich history, stunning architecture, and vibrant culture, Rousse offers a glimpse into Bulgaria's past while embracing the future. The city's central square, Svoboda (Freedom) Square, is a great starting point for exploring.