The dazzling capital of the Czech Republic, the explorable Prague has fittingly been nicknamed "the City of a Hundred Spires." Halved by the Vltava River and notable for architecture Baroque, Renaissance, and Gothic, visitors will find much to take in here.

Costa Rica is a Central American tropical paradise beyond compare. The wildlife is colorful and memorable, from toucans to spider monkeys to sloths. Volcanoes, ziplines, and prime cycling, hiking and surfing opportunities are there for active travelers. For more relaxed vacationers, beaches and vibrant nightlife—from rooftop bars to romantic dining—await.

Ho Chi Minh City, formerly known as Saigon, is the most populous city in Vietnam at 9 million people. It is an enticing mix of the old and new, with European architecture due to French colonization to towering skyscrapers and modern shopping malls.

Flanked by the Caribbean Sea, stunning beaches, and verdant nature reserves, this island retreat is the perfect destination for relaxation or adventure.

Saudi Arabia is an Arabian Peninsula country, with a coastline running along both the Persian Gulf and the Red Sea. Tourism in Saudi Arabia might involve seeing the amazing city of Riyadh, the temples of Madain Saleh, Jubbah's rock art, and the immaculate waters of the Red Sea.