The treasury of Aachen Cathedral is regarded as the most important north of the Alps, featuring over 100 art pieces across various themes. Highlights include the Cross of Lothair, the Bust of Charlemagne, and the Proserpina sarcophagus. The museum offers a remarkable insight into religious and historical art.

Gulangyu Island, just a quick five-minute ferry ride from Xiamen, is a living museum of 19th-century trade and culture. Once a hub for merchants and diplomats, it became home to grand mansions built by Chinese and foreign traders taking advantage of Xiamen’s open port status. The island’s car-free streets are a joy to wander, weaving through colonial-style villas, leafy gardens, and striking architecture that blends European and Chinese influences. Ferries can get busy, especially on weekends and holidays, so booking your ticket two to three days in advance is a smart move. Once you’re there, take your time exploring the quieter corners, enjoying the local seafood, or visiting attractions like the Piano Museum or Sunlight Rock for panoramic views.

Höhenpark Killesberg is Stuttgart’s go-to green space when you want a break from the city buzz. It’s got a bit of everything: a 40-metre spiral tower with city views, a miniature train that loops through the park, and a petting zoo with goats, donkeys, and llamas. During the summer months, the outdoor pool and wave machine are a hit, and there’s plenty of space to picnic or wander through flower gardens.