The center of Luxembourg
It is the seat of several institutions and agencies. In Luxembourg, there are also many medieval castles. During the month of October, there is the feast of walnut, with a market where you can enjoy a variety of culinary delights prepared with the nuts. The best time to visit the Grand Duchy, though, is the month of June: on the 23rd, the national holiday is celebrated. There are outdoor concerts and festivals, both in the capital, and elsewhere around the country.