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.

Pergamum, or Bergama, was a Hellenistic city state that once rivaled Athens and Alexandria as a cultural center. It is the site of one of the Seven Churches mentioned in the Book of Revelation. It became an important missionary center after the adoption of Christianity.

Ancient history comes alive in Athens, the capital of Greece. Gaze in wonder at the Acropolis and its iconic crown, the Parthenon. Take a deeper dive into the past and visit both the Acropolis Museum and the National Archaeological Museum, which house fascinating artifacts from this ancient city.

The capital, 450-year-old Asuncion ("Mother of Cities") merits a visit of unhurried nights - that way, you'll have time to sit in the main square and people-watch. The shopping in this grand city of 729,000 is the finest the country offers, and the cathedral and archaeological museum are both highlights. The governmental architecture is interesting; don't miss the Congressional Palace, Customs House and Government Palace (in the style of the Louvre).

Vilnius, the charming capital of Lithuania, is a city where historical grandeur meets vibrant modernity. The heart of Vilnius is its UNESCO-listed Old Town, one of the largest and most well-preserved medieval city centers in Europe. Wander through its cobblestone streets and admire the stunning Baroque architecture.