Schloss Freudenberg, Experience park in Wiesbaden, Germany.

Schloss Freudenberg is a villa housing over 100 interactive stations scattered throughout its rooms to explore sensory perception. Each station focuses on a different aspect such as balance, gravity, light, darkness, sound, and resonance, all designed to be touched and experienced firsthand.

The villa was designed by architect Paul Schultze-Naumburg in 1904 as a private residence, then changed hands and purposes several times throughout the century. It served as a casino, children's home, and military facility before becoming an educational experience center.

The experience field follows Hugo Kükelhaus's model of 160 stations, instruments and experiments, run by around 80 people of 15 nationalities. A Dunkelbar lets visitors drink in complete darkness, and a Tastgalerie presents objects to identify by touch alone, without seeing them.

The site is open most days of the week with shorter hours on weekdays and longer hours on weekends, though times may shift during school holidays. Visitors should allow time to move through the stations at their own pace, as the experience is not meant to be rushed.

The Dunkelbar is an unlit bar where visitors experience what blindness feels like; the project is run by around 80 people of 15 nationalities who also staff a shop, seminars, holiday programmes and a café. The exhibition itself rests on Hugo Kükelhaus's 160 sensory stations, among them a Windharfe, a Tastgalerie of objects handled unseen and a Botanical Theatre after a Paul Klee painting.