This plaque states that they are eroded formations of a type of marine limestone that sits on top of hardened clay. The plaque reads:The unique land form known as the Chocolate Hills of Bohol was formed ages ago by the uplift of coral deposits and the action of rain water and erosion.The plaque also makes reference to a fanciful explanation of the origin of the Chocolate Hills that is unsupported by any published scientific research, e.g. neither Hillmer nor Travaglia and others, when it states: Self-published, popular web pages present a variety of fanciful and less credible explanations about how these hills formed. They include sub-oceanic volcanism; limestone covered blocks created by the destruction of an active volcano in a cataclysmic eruption; and tidal movements. The lack of any exposed or associated volcanic rocks in the Chocolate Hills refutes the popular theories involving volcanic eruptions. The theories involving either a sudden, massive geologic shift, coral reefs being erupted from the sea, or tidal movements lack any corroborating evidence and support among geologists. Legend The Chocolate Hills inspired many legends. One tells a story of two giants fighting by throwing stones and sand on each other. After the fight, the hills remained. Another legend speaks about a young, strong giant who fell in love with a human girl. When she died, he cried and his tears then petrified and formed the Chocolate Hills. Tourism Two of the hills have been developed into tourist resorts. The main viewing point of the Chocolate Hills is the government-owned Chocolate Hills Complex in Carmen, about from the regional capital Tagbilaran. The other main point to view the Chocolate Hills is at Sagbayan Peak, in Sagbayan, away from the Chocolate Hills complex in neighboring Carmen. Protection Legislation The National Committee on Geological Sciences declared the Chocolate Hills of Bohol a National Geological Monument on June 18, 1988, in recognition of its special characteristics, scientific importance, uniqueness, and high scenic value. As such, this included the Chocolate Hills among the country's protected areas. More protection was provided by Proclamation No. 1037 signed by President Fidel V. Ramos on July 1, 1997, which established the Chocolate Hills and the areas within, around, and surrounding them located in the municipalities of Carmen, Batuan and Sagbayan, Bilar, Valencia and Sierra Bullones, Province of Bohol as a natural monument to protect and maintain its natural beauty and to provide restraining mechanisms