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.

Travelers on the Arabian Sea often find themselves in Muscat, on the Gulf of Oman. This port capital is situated between ocean and mountains, and boasts lovely beaches, great diving sites (watch for turtles!), 16th-century forts, and the impressive Sultan Qaboos Grand Mosque, which can hold 20,000 people.

This southern Mexican state borders Guatemala. Its mountainous highlands and dense rainforest are dotted with several Mayan archaeological sites and Spanish colonial towns.

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

Considered a hub for the world’s information technology industry, India is a major player in the global economy, and its cosmopolitan cities, including Delhi and Mumbai, offer a mosaic of modern and historic architectural styles for locals and visitors alike to enjoy.