If you are planning a trip to Luxembourg City, visiting between May and September is recommended. This period offers more steady weather conditions for a higher chance of outdoor activities. On the other side, you can immerse yourself in the lively and vibrant atmosphere of summer festivals held within the city during this time.

Getting around Luxembourg City is easy and affordable thanks to its efficient public transportation system. Buses and trams are free, so you can save on transportation costs. If you're mainly exploring the city for a short time, you might not need the Luxembourg Card for transportation. However, if you plan to visit multiple museums and attractions, the Luxembourg Card could be a great option for free access or discounts. Overall, taking advantage of the free buses and trams is a convenient way to meet your transportation needs within the city.

A visit to Grund is highly recommended, as it is home to a charming historic district with picturesque views of the Alzette River and stunning European-style architecture. Another must-see attraction is the Grand Ducal Palace, known for its grandeur and elegance. Art enthusiasts should not miss out on the modern and contemporary art museum, Mudam. For history buffs, a stop at the Gëlle Fra Monument is a must, as it was constructed in remembrance of those who fought in World War I and provides a detailed account of the country's past.

In Luxembourg, service charges are typically included in the bill. However, it is customary to give additional tips for satisfactory service. Normally, a tip of around 5-10% of the total bill is sufficient and appreciated.

Luxembourg City offers a delicious fusion of different cultures in its cuisine. You should definitely taste their famous dishes like "Judd mat Gaardebounen," which is smoked meat served with beans, or "Gromperekichelcher," a tasty fried potato dish. To complement your meal, you can try their local drinks, such as Crémant and eau de vie, which can add a unique flavor to your culinary adventure.