Arequipa, known as the "White City," is built from sillar, a pale volcanic stone that glows in the sunlight. This architectural detail gives the historic center its striking appearance and has earned it recognition as a UNESCO World Heritage Site. Towering above the city is the perfectly symmetrical Misti Volcano, which, along with two neighboring peaks, forms a dramatic backdrop.

Midway between Salzburg and Vienna, Linz boasts beautiful Baroque buildings, including Old Town Hall and the Old Cathedral, Alter Dom. Lentos Kunstmuseum Linz has a major modern art collection and across the river, the striking Ars Electronica Center focuses on society, technology, and the future. Some of Austria's most iconic figures, including Adalbert Stifter, composers Wolfgang Mozart and Anton Bruckner, and the famous scientist Johannes Kepler, once called Linz home.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

Point Reyes is a rugged coastal region of Northern California, extending into the Pacific Ocean on the western side of Marin County. Much of the peninsula is protected within Point Reyes National Seashore, where windswept beaches, coastal cliffs, grasslands, forests, wetlands, and rocky headlands create a varied landscape.

Everglades National Park protects a vast subtropical wetland at the southern tip of Florida, where freshwater moves slowly through sawgrass marshes, mangrove forests, hardwood hammocks, and coastal lagoons toward Florida Bay. Covering more than 1.5 million acres, it is the largest subtropical wilderness in the United States. The park is part of a much larger ecosystem whose waters originate in central and southern Florida and eventually reach the Gulf of Mexico and Florida Bay