South of Adelaide, the Fleurieu Peninsula blends vineyards, rolling countryside, coastal towns, sandy beaches and rugged ocean scenery.

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).

Mauritania, stretching between the Atlantic Ocean and the Sahara Desert, offers travelers a journey through wide-open landscapes and centuries of history. Its terrain is marked by shifting sand dunes, ancient caravan towns, and stretches of untouched coastline.

Nogales is a border city in Santa Cruz County in southern Arizona, directly adjoining Nogales, Sonora, Mexico. Its setting in the Santa Cruz River Valley gives the city a distinctive landscape of rolling hills, desert vegetation, and mountain ranges. As one of the principal border crossings between Arizona and Mexico, Nogales has long served as a center for trade, transportation, and cross-border commerce.

Lac Abbe, straddling the border between Djibouti and Ethiopia, is one of East Africa’s most otherworldly landscapes.