Seidelsberg is a forested phonolite dome rising above the eastern Upper Lusatia landscape, one of three such volcanic hills alongside Breiteberg and Steinberg. It is a quiet, easy walk through mixed woodland with rocky outcrops and a rewarding view over the border into the Czech mountains.

The summit itself is crowned with rock formations and scattered boulders, though the dense forest cover blocks any view from the very top. The north-northeast slope is covered in spruce forest, while the south-southwest side carries a deciduous woodland - once farmed as a peasant forest, now protected as an oak-hornbeam habitat with hazel, hawthorn and rowan in its understorey. The greater mouse-eared bat and Natterer's bat have both been recorded here. Descend slightly below the summit to the east or southeast, and the trees open up to reveal a fine view across the Zittau Basin toward the Jizera Mountains and Ještěd.

• From Bertsdorf - forest path, about 30-40 minutes, easy difficulty
• The Oberlausitzer Ringweg trail crosses the western slope, connecting Breiteberg with the Butte valley

• The hill lies within the 21.9 ha Natura 2000 site 'Basalt- und Phonolithkuppen der östlichen Oberlausitz'
• Views are only found on the slopes below the summit, not at the top itself

The hill was once known as Roschersberg and only took the name Seidelsberg in the 19th century, after the family who owned the farm covering its slopes.