How many years old is the Amarnath Cave Temple?

The Amarnath Cave Temple is 5,000 years old.
Built: 1585.
The shrine’s Shiva lingam is a Swayambhu lingam. The lingam is a naturally occurring stalagmite formation found inside a 40 m (130 ft) tall cave on Amarnath Mountain, which has a peak elevation of 5,186 m (17,014 ft).