This is the most famous tourist attraction in Bohol. It is an unusual geological formation. It is composed of around 1,268 perfectly cone-shaped hills of about the same size, spread over an area of more than 50 square kilometres (19 sq mi). They are covered in green grass that turns brown during the dry season, hence the name.

It is featured in the provincial flag and seal to symbolize the abundance of natural attraction in the province.It is in the Philippine Tourism Authority's list of tourist destinations in the Philippines; it has been declared the country's 3rd National Geological Monument and proposed for inclusion in the UNESCO World Heritage List.

“ Most people who first see pictures of this landscape can hardly believe that these hills are not a man-made artifact. However, this idea is quickly abandoned, as the effort would surely surpass the construction of the pyramids in Egypt. ”