INDIA, August 20, 2022 (Komando): Optical illusions have been around for over a thousand years. The oldest visual puzzle known to man was carved in stone in an Indian temple. For centuries, people have struggled to conquer these classic optical illusions. But if you’re looking for the oldest optical illusion known to mankind, you’ll have to get off social media. Then, you must book a plane ticket to India. Specifically, you should head to the Airavatesvara Temple in the southern state of Tamil Nadu. This holy Hindu temple is full of elaborate animal carvings. One of its 900-year-old ornaments depicts two conjoined animals with what looks to be a single head. In reality, there are two heads — but most people only see one at first. Which animal do you see first? The elephant which represents Airavat, a holy elephant connected to King Indra. Or, the bull which represents Nandi, a sacred bull connected to Lord Shiva.
https://www.komando.com/lifestyle/classic-optical-illusions/853255/