The Krishna’s Butter Ball or Vaanirai Kal (Stone of the Sky God), as it is known to locals, has been sitting on a 45-degree slope in Mahabalipuram for over 1,300 years. The 20ft rock appears to defy gravity, looking like it's going to roll at any moment - and all attempts to move it have been in vain.
Hindu folklore offers another suggestion - that deity Lord Krishna would often steal handfuls of butter from his mother's jar, and this natural boulder is attributed to the mass of butter that he pinched.
Not for a lack of trying, the mission was unsuccessful, and a similar endeavour was undertaken in 1908 by the Governor of Madras, Arthur Lawley.
He feared for the safety of the town at the base of the hill and is said to have used seven elephants to try to move it, also without any luck.
Unsurprisingly the abnormal rock is popular with tourists and locals, who pose for daredevil photographs under its base, attempt to push it down the hill (in vain) or simply use it as a sun shield.