It 's Jacob 's ball .

Yakupaga Tower is one of the places worth seeing in Kastamonu, which is a five-minute walk from Nasrullah Mosque. Built on a hill with a magnificent view of almost the entire city, the ashes of Yaqub are home to structures such as a mosque, a madrasa, and an ashram. Today, the Yakupaga drawing helva house operates in the construction department of the Yakupaga ashtray. This jam house is open to the public and at certain hours you can see the steps of making jam and buy fresh jam. The tea garden, surrounded by greenery, has a small market where you can buy souvenirs and a social life.