The Zoroastrian Kaaba, also known as the Ka'ba-ye Zartosht, is located in the ancient city of Naqsh-e Rustam in Iran. It is a cube-shaped structure carved into a cliff that dates back to the Achaemenid Empire and is believed to have served as a Zoroastrian fire temple. Rostam is a legendary hero in Persian mythology and folklore, known for his strength and bravery.