The Royal Gardens of Herrenhausen with their baroque Great Garden have remained unchanged for more than 300 years. The grotto designed by the artist Niki de Saint Phalle is a major attraction here. The "Red Thread", a line painted onto the road, provides the ideal way to explore the places of interest in the centre of Hannover without a guide. The world's foremost trade fair venue has a very cosmopolitan feel at its atmospheric festivals, celebrations and concerts, as well as a lively cultural scene.