The Explorer D.
Google
Helmhaus is a contemporary art museum that works well as a mental reset and a change of perspective. The exhibition is minimalist and conceptual: the first rooms are intentionally empty, followed by installations with screens, sound, and objects in various shades of yellow.
Admission is free, which makes the visit especially pleasant. This place is either for those who enjoy contemporary art and look for meaning in it, or simply for anyone who wants to slow down, detach, and observe. A nice bonus is the beautiful view from the windows over the city and the river.