20 May 2008
Chocolate Hills of the Philippines
“…The Chocolate Hills is an unusual geological formation in Bohol, Philippines. 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…"
Although they appear to be man-made, these are natural formations, though the geologic mechanism for their formation is still in dispute.
(more information at this Wikipedia link)