If you find yourself in Rotterdam, there's a strong chance you've arrived by water. This popular port city (the second largest in the Netherlands) has gone through an architectural renaissance since World War II, with daring, innovative structures dotting the city (cube houses!) and defining its skyline. Café culture is on the rise here, so grab yourself a table and a cup.

Mai Chau is a rural valley in Hoa Binh Province in northern Vietnam, located several hours west of Hanoi and surrounded by limestone mountains and rice fields. The area is known for its quiet villages, elevated wooden stilt houses, and the daily life of the White Thai ethnic community.

One of Africa's most popular game reserves, Maasai Mara is located in Narok, Kenya, near the border of Tanzania. Named in honor of the Maasai people, this park is populated with wildlife including elephants, lions, zebras, and leopards.

The southernmost island in the crescent-shaped Comoros archipelago. Encircled by a barrier reef, Mayotte is blessed with one of the world's perfect lagoons. In its lush forests, the fragrant yellow flowers of the ylang-ylang tree are picked to extract their perfumed oil. Against a backdrop of waterfalls and volcanic peaks on Mayotte, there is a feeling of rural tranquility.

Costa Rica is a country that has built its identity around both natural preservation and cultural vibrancy. Known for its stable democracy and emphasis on sustainability, it has become a global leader in eco-tourism.