Bolivia

This country in west-central South America boasts one of the world's highest capital cities, La Paz, located two miles above sea level. In La Paz, you can explore an Indian market set amid the narrow streets of the old town. Some tours include a cruise of Lake Titicaca on the Bolivia-Peru border. These hydrofoil cruises typically visit Moon Island, site of the most significant Inca ruins on the lake, and Sun Island, said to be the birthplace of the Inca Empire.

Some departures also venture to the whitewashed colonial structures of Sucre and the unusual landscape of Salar de Uyuni, an expansive salt flat.