Chitwan National Park is one of Nepal’s most important protected natural areas. Located in the subtropical lowlands of southern Nepal, the park is known for dense sal forests, grasslands, rivers, and a large concentration of wildlife.

The Black Forest is a mountainous region of southwest Germany between the Rhine and Neckar rivers, near Baden and Wurtemburg. A part of the ancient Hercynian forest, it is a year-round resort area that is famous for its clock and toy industries.

Adak Island lies in the central Aleutian Islands of southwest Alaska, where steep volcanic mountains meet the North Pacific. The community of Adak occupies a sheltered harbor on the island and is one of the few remote Aleutian locations accessible by commercial airline. Much of the island consists of open tundra, rugged slopes, coastal wetlands, and rocky shorelines shaped by strong winds and frequent rain.

Coursing through 10 countries, the Danube is the second-longest river in Europe. This waterway, lined with fortresses and castles, rises in Germany's Black Forest and runs for 1,770 miles to the Black Sea. The Danube is an essential commercial thoroughfare for central and southeastern Europe, and several river cruise companies sail vessels on it year-round. Destinations along this river include Vienna, Budapest, Passau and Bratislava.

Porto Torres is a city in northern Sardinia, situated on the bay of the Gulf of Asinara. It is home to a number of historical sights: the Basilica of San Gavino, an 11th-century Romanesque church, the largest in Sardinia; the necropolis of Su Crucifissu Mannu, an archaeological site from the Neolithic age; the remains of the Roman bridge on the Rio Mannu; and the ancient megalithic edifices known as nuraghi which have become a symbol of the Sardinian region.