After a long while searching he had found it, Rin released control of owl and it happily flew away.
Then he stood up and walked through the thick undergrowth of the forest for about 4 miles until he found the entrance. 
[hider=Hidden Door][URL=http://s766.photobucket.com/user/rinionheleg/media/mostri-turtle-crypt_zps8f9b3472.jpg.html][IMG]http://i766.photobucket.com/albums/xx307/rinionheleg/mostri-turtle-crypt_zps8f9b3472.jpg[/IMG][/URL]/hider]

It was very old and unused but Rin knew he had to go inside, how ever he wasn't stupid so he summoned a scout to go ahead first.

[hider=Scout][URL=http://s766.photobucket.com/user/rinionheleg/media/creatures_by_email__news_on_the_blog_by_cloister-d5f446q_zps8149cf9a.jpg.html][IMG]http://i766.photobucket.com/albums/xx307/rinionheleg/creatures_by_email__news_on_the_blog_by_cloister-d5f446q_zps8149cf9a.jpg[/IMG][/URL][/hider]