This is one serious secret door. In fact, you can hardly call it a door, being it is the entire exterior of a house(!)
"Our home sits on a small private grass airstrip on the shores of Lake Harney in Florida. This side faces the taxi way and the other side Lake Harney. At this point we're about 65% done."
Wow, I have to admit this kinda puts all of WonderHowTo's garage HowTo projects to shame...
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.