Burg Pottenburg, also known as Hasenburg or Mädchenburg, stands as Austria's easternmost castle, perched as a spur castle in the Low Carpathians near Wolfsthal. Originally fortified around the year 1000 under Count Poto, it served as a crucial border fortress guarding the Hainburger Pforte gateway. Following Turkish sieges in the 16th century, the castle transformed into a romantic ruin and remains freely accessible today, offering visitors a glimpse into medieval frontier defenses.