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.

Pemba Island, located off the coast of Tanzania in the Indian Ocean, offers an idyllic escape for travelers seeking pristine natural beauty and cultural depth. Known as the "Green Island" for its lush, tropical landscapes, Pemba is a quieter, less-visited alternative to its famous neighbor Zanzibar. The island is a haven for those interested in diving and snorkeling, as its coral reefs teem with marine life, from colorful fish to graceful sea turtles.

Tucked between Jordan's sandstone cliffs in the southwestern desert, Petra was carved directly into rose-colored rock more than 2,000 years ago. Visitors approaching through the narrow gorge known as the Siq are rewarded with their first glimpse of Al-Khazneh, the Treasury, a towering facade that seems to appear from another world.

Slovakia is a country shaped by mountains, castles, and centuries of shifting borders. Tucked in the heart of Europe, it offers visitors a chance to explore medieval towns, alpine peaks, and deep-rooted traditions still practiced in daily life. Bratislava, the capital, sits along the Danube River and is one of the few national capitals that borders Austria and Hungary.

Ceske Budejovice, the vibrant capital of the South Bohemian Region in the Czech Republic, is a city rich in history and culture. Its most famous landmark is the magnificent Black Tower, offering panoramic views of the city and the surrounding countryside. This 72-meter-tall Gothic tower, completed in the 16th century, is a prime example of the city's architectural heritage source.