Roman legions marched into what is now the Rhineland's largest city in 38 B.C. These two thousand years have produced a wealth of sites to visit, from Roman towers to Gothic churches to modern architecture. With a reputation as a fine art center, Cologne has museums running the gamut from the Museum of Applied Art to Museum Ludwig, home to works by Warhol and Picasso, to the Chocolate Museum. The city has an excellent bus, tram and train system, on which Kolner Tageskarte, Day Tickets, are valid.

Plan on giving your feet a workout in York, a historic walled city about two hours north of London by rail. The compact riverside locale is packed with attractions, including the biggest Gothic medieval cathedral north of the Alps, the Jorvik Viking Centre and the Yorkshire Museum, which brims over with sculpture, jewelry and fossils from the area. Visit Clifford's Tower, built by William the Conqueror in 1069, for the one-two punch of history and great city views.

The capital of Puglia and one of southern Italy’s most prominent cities, Bari combines seaside charm and historical appeal. A major Mediterranean cruise port, the university city is also known for its old town, which boasts churches, picturesque courtyards, and other tucked-away gems.

Lourdes, nestled in the majestic Pyrenees mountains, is renowned for its breathtaking scenery and serene atmosphere, making it an ideal place to recharge your batteries. The famous shrine of Notre-Dame de Lourdes attracts millions of pilgrims every year, offering hope and inspiration. Outdoor enthusiasts can enjoy activities such as hiking, cycling and skiing in winter, thanks to the exceptional opportunities offered by the surrounding nature. Lourdes also boasts a rich cultural heritage, with unique architecture, captivating history and delicious local cuisine to sample. Located in Occitanie, the south-west region of France, Lourdes offers easy access to top sites such as the UNESCO World Heritage-listed Cirque de Gavarnie, the Pic du Midi and the diverse flora and fauna of the Pyrenees National Park.