Visit Monaco

The world's smallest state holds its biggest art: St Peter's, the Vatican Museums and the Sistine ceiling

Visit San Marino, the world's oldest republic founded in 301 AD. Explore the historic center of San Marino City, a UNESCO World Heritage site with medieval fortifications like the Three Towers (Guaita, Cesta, and Montale) offering panoramic views of the Italian countryside. See the Palazzo Pubblico (government building with Gothic architecture) and the Basilica di San Marino (neoclassical church housing relics of Saint Marinus).

Decode megalithic temples, honey-stone harbors, and sunlit coves of Malta

Visit Luxembourg, a small landlocked country in Western Europe. Explore the UNESCO-listed Old Town of Luxembourg City with its fortifications and casemates, see the Grand Ducal Palace (official residence of the Grand Duke), walk across the Pont Adolphe (a stone arch bridge offering views of the Pétrusse Valley), and try local dishes like judd mat gaardebounen (smoked pork with broad beans) or gromperekichelcher (potato fritters).

Hike alpine ridges, riverside trails, and storybook capital of Liechtenstein

Ski Pyrenean slopes, hike high lakes, and wander alpine villages of Andorra

Visit Athens, the historic capital of Greece. Explore the Acropolis (ancient citadel with the Parthenon temple, built in the 5th century BC), wander through the Plaka district (old neighborhood with narrow streets and traditional tavernas), see artifacts at the National Archaeological Museum (one of the world's greatest museums of ancient Greek art), and watch the changing of the guard at the Tomb of the Unknown Soldier in Syntagma Square.

Visit Valletta, the fortified capital of Malta. Explore the Baroque masterpiece of St. John's Co-Cathedral (home to Caravaggio's painting 'The Beheading of Saint John the Baptist'), walk the historic streets of the UNESCO-listed city center, and see the Grandmaster's Palace (former seat of the Knights of St. John, now housing the Office of the President).