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.

Seclusion is the name of the game on Lizard. It's a large national-park island and surrounded by Osprey Island, Seabird Islet, South and Palfrey islands. Lizard has special historical interest due to Captain Cook's visit. It also has fine diving and fishing possibilities, 23 superb beaches (among the reef's best) and great swimming and snorkelling.

The Island of Mozambique, a UNESCO World Heritage Site, is a historical gem nestled off the northern coast of Mozambique. This small island, which was once a pivotal trading post, boasts a rich tapestry of history and culture. The island's main attraction is the Fort São Sebastião, an imposing 16th-century fortress built by the Portuguese to protect their trading interests.

Mayotte, a French overseas department nestled in the Mozambique Channel between Madagascar and mainland Africa, offers travelers a window into a lesser-known island culture shaped by Swahili, Malagasy, and French influences. Unlike its neighbors in the Comoros archipelago, Mayotte remains part of France, giving it a unique blend of European infrastructure and Indian Ocean traditions.

Oslo, Norway’s capital, stands at the crossroads of Nordic history and forward-thinking design. Originally founded over a thousand years ago by Viking King Harald Hardrada, the city has evolved from a medieval trading hub into one of Europe’s most modern capitals. Visitors can explore its layered past at the Akershus Fortress, a 13th-century stronghold still standing guard over Oslofjord, or walk through the preserved wooden homes of Damstredet.