Trier, Germany’s oldest city, is a living museum nestled in the Moselle Valley, where Roman ruins rise beside medieval churches and bustling market squares. Founded by the Romans in 16 BCE, Trier was once known as “Roma Secunda,” the second Rome, and still boasts the largest collection of Roman architecture north of the Alps. The Trier Cathedral (Dom St. Peter), which is a UNESCO World Heritage Site, is the oldest church in Germany and houses a relic said to be the Holy Robe of Christ.

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

The River Nile, most often associated with Egypt and its ancient civilizations, actually flows through eight other countries including Uganda, Ethiopia, Sudan, and Kenya. It is formed by two major tributaries, the White Nile and Blue Nile, and is considered by many to be the longest river in the world when measured from its source waters in Rwanda and Burundi.

Located northwest of Cairo on the Mediterranean coast, Alexandria is one of Egypt's most spectacular cities and an important historical, industrial, and economic center for the country.

Mendoza sits at the base of the Andes in western Argentina, where sun-drenched plains meet snow-capped peaks.