A double chestnut-lined avenue (Aesculus hippocastanum L.) once led to the former Mansion of Ponikva (Ponigl) and was an integral part of the castle garden from the second half of the 19th century. Today, only a short part of the avenue has been preserved. It consists of 33 trees, with the oldest trees reaching heights of 22 m and diameters of 60 to 105 cm.
The common horse chestnut is native to northern Greece and Albania and at the end of the 19th century, was one of the most popular ornamental trees in European parks and avenues.
The avenue has the status of designed natural values of local significance and is protected as a natural monument through a municipal ordinance.
Since 2009, the avenue has been managed by the Tourist Embellishment Society of Ponikva.