Wonderfeel is the largest outdoor classical music festival in the Netherlands (and Europe), with over 100 performances by more than 500 musicians for nearly 10,000 visitors over three days. After being held for 10 years at the estate Schaep and Burgh in ’s Graveland, since 2025, the festival takes place at Landgoed Groeneveld in Baarn. Same concept, same natural beauty. A weekend of enjoying music and the beautiful surroundings, wandering between seven stages, each with its own musical character. From Baroque to minimal, from classical hits to fresh new compositions, from solo to symphonic, with connections to jazz, pop, and non-Western music. All performed by (inter)national world-class musicians, young talents, and seasoned veterans.

In addition, Wonderfeel presents art forms that align with or extend from (classical) music, such as dance, music theater, poetry, literature, and music documentaries. Nature walks, yoga, and various children's activities complement the program. Through the sale of day tickets, a full festival schedule with parallel programming, food trucks, and a campsite within walking distance of the festival grounds, Wonderfeel has the atmosphere of a pop festival. In doing so, the festival occupies a unique position within the classical festival landscape, adding a different experience of classical music.