What is the tallest mountain in the world if measured from base to top?
Are you sure that you haven't heard of this mountain before? It is not as famous as Mount Everest but this fact doesn't make it lower, does it? The thing is that the largest part of the mountain is hidden under the water. If we speak about the distance from the seafloor to the peak, the mountain turns out to be over 33,000 ft tall! But above the sea it is only 13,796 ft.