While speaking of cavemen, images spring to our mind far from majestic caverns, caves and grottos. We put together many caves that exist around the globe, all beautiful, many of them hidden and almost inaccessible.
We know you want to see and visit them, but we have to warn you fellow lazy penguins that most are closed to the public and can only be accessed by extreme athletes (like 2 lazy penguins) ; luckily for us, professionals often accompany these expeditor-photographers.
Check the next photos and try to guess which cave is ranking FIRST!
15. Sơn Đoòng Cave, Vietnam