Caminha sits at Portugal’s northern edge, where the Minho River meets the Atlantic and marks the border with Spain. Its history is closely tied to defense and trade, visible in remnants of medieval walls and a compact historic center that once guarded the river mouth.

Situated in the Parque Nacional Iguazú near Puerto Iguazú, these spectacular falls lie just east of the confluence of the Iguazu and Paraná rivers. At least 5000 cubic m of water per second plunge the 70m into the abyss below.

Mont-Saint-Michel rises from tidal flats along the Normandy coast, its abbey and village shaped by centuries of pilgrimage, defense, and isolation.

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.

A favorite for many cruise-goers and tourists, Ketchikan, Alaska, is a charming city located near the state’s southeastern edge.