Only six and a half hours by jet from New York, Morocco nevertheless seems worlds and worlds away. Even the Moroccans think of their country, which lies on Africa's broad western shoulder, as a place apart: They refer to it as El Maghreb al Aqsa, the Farthest West, as indeed it is, of all the countries making up the Arab world.

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.

Visit the ancient city of Memphis and take in the wonders of the recumbent statue of Ramses II and the 80-ton Alabaster Sphinx.

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.

Tromsø, a gem nestled in the Arctic Circle, offers an unparalleled blend of natural wonders and cultural richness. Known as the "Gateway to the Arctic," this Norwegian city is famed for its spectacular Northern Lights. Between September and April, Tromsø becomes a prime location for witnessing the aurora borealis, a mesmerizing display of green, purple, and pink lights dancing across the polar sky.