Seggau Castle is located on a wooded hill in the village of Seggauberg in the municipality of Leibnitz. The Sulm flows around the Seggauberg in a loop. This separates it from the Kreuzkogel to the north.

A guided tour of the castle provides interesting historical impressions. Discover, among other things, the baroque Fürstenzimmer and the Seggauer Liesl, the largest historic bell in Styria with a diameter of two meters.