Sandwiched between Switzerland and France, Lake Geneva (called Lac Léman in French) is a stunning natural gem known for its picturesque landscapes and beauty. One of the largest lakes in Europe, it offers breathtaking views of the Alps and the Jura Mountains. The lake's shores are dotted with charming towns and cities, including Geneva, Montreux, and Lausanne, as well as the iconic Chillon Castle.

Even though Georgians are not the biggest fans of their Soviet heritage, this great example of Tbilisi 70s brutalism must not be missed. Built on steep slopes in Nutsubidze street, it is one of the quirkiest constructions you will ever see. The three apartment blocks are connected by a bridge that goes through them. From the sky bridge, you can also see a nice view of the residential parts of Tbilisi. Once you are up and walk through the bridge, turn right and take a walk down the winding streets and admire a Caucasian architectural know-how: semi-legal additions to residential blocks of all shapes, sizes and materials.

CERN is the world’s largest particle physics lab and home to the famous Large Hadron Collider. You can visit the free Science Gateway, which has hands-on exhibits, short films, and live science demos. Guided tours are also available, but spots are limited and usually go fast — best to arrive early and register on-site.

Ostuni, about 32 km (20 miles) west of Brindisi, where a labyrinth of whitewashed lanes and alleys surrounds a hilltop crowned by a medieval cathedral, is the most impressive of Apulia’s "white towns", with sweeping views across the surrounding farmlands to the east coast.