I have a full control permission of our team's Sharepoint site (I think it's Sharepoint 2010, but could also be 2013... I can't tell). For test purpose I created a subsite within this site. I set the subsite to not inherit the parent site's permission and make myself the only user who can see and access the subsite. Later I removed myself as the user of this subsite (i.e. this subsite has no user and no admin). Now whenever I am in the main site, I still can see the link to this subsite, but I cannot access it (it says 'access denied'... I also can't delete this subsite). I would consider this a flaw that Sharepoint lets me make my subsite unreachable, but is there any away I can regain access to this subsite?
Is there perhaps any permission that is more powerful than Full Control?
p.s. this can also happen with document libraries, list, etc.