Tower of Slaves is a small, high rectangular building with thick walls and openings in the upper part. It is built of rough stone, brick, lime and clay mortar in the Stelmužė park, near Padvarinės (Stelmužė) lake.
In XVII-XIX centuries there was a manor house, originally owned by Germans Fölkersahms, and later by the Tsar's courtiers Valujevs, who were known for their cruelty. In the b