Mokrice castle dates from the 16th century, but there are bits and pieces going back to Roman times built into the structure. It's supposedly haunted by the ghost of the 17th-century countess Barbara, who committed suicide here after her lover failed to return from sea. She's particularly active on her name day (4 December) when she spends the night rolling cannonballs around the joint. The castle is home to a hotel; its lovely grounds are open to all at no charge.