Katmai National Park and Preserve lies along Alaska’s remote Pacific coast, shaped by volcanism, glaciers, and deep time. The area gained prominence after the 1912 Novarupta eruption, one of the largest volcanic events of the 20th century, which transformed the landscape and led to the creation of the Valley of Ten Thousand Smokes.

American Samoa consists of a group of seven islands in the southern Pacific Ocean, comprising Tutuila; the Manua group, consisting of Tau, Olosega, and Ofu; Aunuu; Rose Island; and Swains Island.

Lewa Wildlife Conservancy lies in northern Kenya at the foothills of Mount Kenya, where open savannah, wooded hills, and seasonal rivers create a varied and striking landscape.

This 2,000-year-old city, where the Teutonic Order founded one of its first commanderies in the 13th century, lies on the convergence of the Moselle and Rhine Rivers. Hop on a cable car, one of the city's most popular attractions, for stunning city-wide views, or cruise down the Rhine to spot some of Koblenz's magnificent fortresses and castles, including the Ehrenbreitstein Fortress and Schloss Stolzenfels.

A lesser-known river port in the Mekong Delta, Sa Dec was once the capital of Dong Thap province of southern Vietnam. Today, it is best known for its flower gardens and authentic bustling market. The city is also famous as the setting for French writer Marguerite Duras' 1984 novel, The Lover, and its 1991 film adaptation of the same name.