Strange but true - the Shiva Linga in the Kardo Hills is said to be mentioned in the 1893 edition of Shiva Purana.
Shiva Purana was compiled by Sage Veda Vyas and is one of the eighteen important sacred Hindu texts. What lends credence to the claim of Kardo Hills connection with the Shiva Purana is that the discovery of a giant Linga in the Himalayas is predicted in the sacred book. As can be read in the third line from the bottom in the picture, the name Arunachal is mentioned in the text.
Whatever the fact, the site attracts different kinds of visitors and some permanent inhabitants like the pigeon here.