Visiting a hospital by choice might seem strange to some, but a glimpse into the workings of St. Marien Hospital is a worthwhile experience. If you're interested in the health industry, check to see if there's a tour or open day scheduled.
You're spoiled for sightseeing choice when staying in Marsberg. St. Marien Hospital is a great place to start here, but there are plenty of other worthy sights to check out. Fuerstenberg Castle, and Kilianstollen Mine are close to the health care institution and and will cap off your day nicely.