Antoni Gaudí's ambitious project remains, as of today, unfinished, which by no means takes away its massive popularity, receiving nearly 4.5 million visitors every year. The Basílica de la Sagrada Família, or simply La Sagrada Família, is a large unfinished Roman Catholic minor basilica, considered the best example of Modernist architecture. Meticulously crafted to embody the Christian faith through composition, sculpture, and individualistic, offbeat design, this masterpiece is the kind of attraction that has to be experienced to be believed. Guided and audio tours are available in several languages.

In the outskirts of Nottingham, in Ruddington to be exact, you can find this living museum. You might not know that the people of Nottinghamshire have been knitting for over 400 years. Visit the Framework Knitters' Museum to see how they lived and maybe create your own souvenir to bring home?

The Grocery Museum is a charming little establishment and a museum that offers sweets, such as liquorice, butter cookies and more, all of them locally made in Utrecht. The museum is housed in a 17th-century building, which initially served solely as a shop. Today it is both a shop and an exhibition space displaying a range of nostalgic items, including treats and artefacts reminiscent of the 19th century.