Kresty Prison
Kresty Prison on the Arsenalnaya Embankment in Saint Petersburg is Russia's most famous historic isolation detention center. Built in the late 19th century in the shape of two giant cross-shaped brick blocks, Kresty housed imperial revolutionaries, Soviet political prisoners, and Stalinist purge victims. Famous for its extreme overcrowding and dark history, the complex is haunted by phantom weeping, echoing keys, and restless spirits of former inmates.