Discover the charm and history of Krems, Austria, a city nestled along the picturesque Danube River and the gateway to the enchanting Wachau Valley. With origins dating back to Roman times, Krems is a treasure trove of historical and cultural wonders.

London is among the world's most visited cities, with countless attractions and a history stretching back two millennia. Visitors will discover historic iconic structures like Westminster Abbey, Big Ben, and Tower Bridge, as well as recent marvels such as London Eye, a giant observation wheel that offers breathtaking views of the whole city.

Londonderry, often called Derry, is a city steeped in history and charm, uniquely surrounded by remarkably well-preserved 17th-century walls. In fact, it holds the title of being the only completely walled city in all of Ireland. Strolling along these ancient ramparts offers visitors not only a glimpse into the past but also breathtaking panoramic views of the winding River Foyle and the lively streets below.

Nicaragua is the largest republic of Central America. The capital and largest city is Managua. Nicaragua has highlands; several mountain ranges; and a great basin, or depression, containing two lakes, Lake Nicaragua, the largest in Central America, and Lake Managua. The two are connected by the Tipitapa River.

Located on Ecuador's central coast, Manta is a port city frequented by many South American cruises. Manta is known for its delectable seafood and variety of pleasant beaches.