Poland is a central European country bordering seven other nations. Among its notable features are its lush forests, rivers, and majestic mountains.

Traditionally regarded as the highest navigable body of water in the world (in reality there are higher lakes in Chile and Peru), Lake Titicaca is immense: its dimensions measure 233km from north-west to south-east and 97km from north-east to south-west. The lake has an indented shoreline, 36 islands and exceptionally clear sapphire-blue water.

From the rugged highlands and volcanic plateaus to the lowland deserts and the Great Rift Valley, Ethiopia's terrain is as varied as it is dramatic.

Manaus, the capital of Brazil's Amazonas, is a major entryway to the vast and biodiverse Amazon Rainforest. Situated on both the Rio Negro and Amazon River, this city will charm you with Renaissance-style buildings and a variety of city parks, museums, and theatres.

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.