It is famous for its annual Karl May Festival, which takes place in the town's Kalkberg Stadium, a large amphitheater originally built by the Reich Labour Service into an exploited quarry at the Segeberger Kalkberg.

There is a large television tower in the middle of the town.

Bad Segeberg is not far from the eastern edge of the hills of Ostholstein.

In the south, Bad Segeberg is bordered by the towns of Högersdorf and Klein Gladebrügge.

There were even sinkholes in the town itself, although these have all been filled in and are no longer visible.