Amsterdam, the 17th century capital of Holland, is often called the "Venice of the North" due to its numerous, boat-navigable canals. Truly rich in history, the oldest part of this populous, multicultural city is Sloten, which dates all the way back to the 9th century.

An essential passageway between the Atlantic and Pacific Oceans, the Panama Canal is an extraordinary technological landmark and a testament to human innovation. Built in the early twentieth century by American engineers, the canal weaves through the Panamanian isthmus and allows easy access for commercial freighters and cruise ships alike.

Replete with windmills and old-world charm, the village of Kinderdijk lies east of Rotterdam on the Lek River and is a popular stop for European river cruises. Home to the largest concentration of old windmills in the Netherlands, Kinderdijk was designated a UNESCO World Heritage Site in 1997.

Bryce Canyon, tucked into the high plateaus of southern Utah, offers one of the most unusual landscapes in the American Southwest. It’s not actually a canyon but a series of natural amphitheaters carved into the edge of the Paunsaugunt Plateau. What makes Bryce unique is its dense collection of hoodoos which are tall, thin spires of rock formed over millions of years by frost-wedging and erosion.

The Olympic Peninsula occupies the far northwest corner of Washington State, where mountains, rainforest, and coastline meet within a relatively compact area.