Cable cars, Fisherman's Wharf, and of course, that famous bridge.... San Francisco beckons visitors with a mild climate, world-class dining and culture, and of course, that famous rolling fog.

Puerto Rico is a colorful and invincible archipelago. This U.S. territory, irrevocably shaped by colonialism and dramatic weather events, is awash in culture, with much to be learned in its art galleries and its centuries-old citadels. Capital city San Juan is the largest city and tourism hub. Visitors should see Old San Juan, the inviting beaches, and Museo de Arte de Ponce, among the finest art museums in the Caribbean.

A Russian jewel on the Baltic Sea, St. Petersburg was founded by Peter the Great, but named after the Saint. There's plenty to fascinate visitors to this most cultured and European of Russian destinations, from the expansive Hermitage Museum to spectacular palaces and cathedrals.

Canada's second-largest city and the most populous city in Québec, Montréal is a cultural capital and replete with magnificent architecture, immersive museums, and lush botanical gardens and parks.

Berlin has an undeniable history. The horrors of World War II, division, reunification, revolution all profoundly impacted the city in the 20th century. Today, visitors will find a sophisticated, high-energy city with endless cultural, architectural and gastronomic attractions.