The Chocolate Hills are not the only example of conical karst hills on earth. Slovenia and Croatia both have conical karst hills, except that the Chocolate Hills are simpler examples because the Chocolate Hills have no caves. The Bungle Bungles in the Purnululu National Park in Western Australia feature similar sedimentary formations.
The Chocolate Hills is a rolling terrain of haycock hills – mounds of general shape which are conical and almost symmetrical. Estimated to be at least 1,268 individual mounds to about 1,776, these cone-shaped or dome-shaped hills are actually made of grass-covered limestone. The domes vary in sizes from 30 to 50 metres high with the largest being 120 metres in height. They are scattered throughout the towns of Carmen, Batuan and Sagbayan in Bohol. Bohol's "main attraction", these unique mound-shaped hills are scattered by the hundreds on the island's central plain, concentrated near the town of Carmen.
The Chocolate Hills are a famous tourist attraction of Bohol. They are featured in the provincial flag and seal to symbolize the abundance of natural attractions in the province.They are in the Philippine Tourism Authority's list of tourist destinations in the Philippines; they have been declared the country's third National Geological Monument and proposed for inclusion in the UNESCO World Heritage List.
During the dry season, the precipitation is inadequate such that the grass-covered hills dry up and turn chocolate brown. This transforms the area into seemingly endless rows of "chocolate kisses". The branded confection is the inspiration behind the name, Chocolate Hills.
