I have been at Sparrenburg twice, and I can only recommend this place to the tourists in Bielefeld.
It's a historical place first of all, second of all the buildings are well kept and not at all dilapidated. Thirdly, you have the best view of the city from the tower of the castle, and on a clear day, you can spot the Hermannsdenkmal 25 kilometres away in Detmold!
I would recommend to take tour of the catacombs which is really exciting and informative.
If you own or manage Sparrenburg, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.