Most commonly reached via travel from Cusco, Ollantaytambo is an Incan archaeological site in the Sacred Valley of southern Peru. The town dates from the late 15th century and is home to some of the oldest continuously-occupied dwellings in South America.

The commercial and cultural center for the Ruhr region on the Rhine River, Duseldorff is also the site of the Felderhof Cave where Neanderthal man was found in 1856.

A tributary of the Rhine, the Moselle River flows through France, Luxembourg and Germany. The Moselle also lends its name to a region of France, a valley which it bisects, and a wine produced along its banks.

Rhode Island may be the smallest state in the U.S., but it offers an outsized variety of experiences, from colonial history to coastline escapes. Founded in 1636 by Roger Williams as a haven for religious freedom, the state still reflects its independent spirit. In Providence, travelers can visit the John Brown House Museum to explore the city’s role in early American commerce, or walk Benefit Street, lined with preserved 18th- and 19th-century homes.

The former Netherlands Antilles was a group of Caribbean islands once unified under Dutch administration, dissolved as a political entity in 2010.