Soar Over the Chocolate Hills in the Philippines

On the island of Bohol, in the Philippines, there's an expanse of otherworldly cones that are known as the Chocolate Hills. They formed naturally, over millions of years and change appearance over the course of each year – lush in the rainy season, the vegetation dries in summer, imparting the golden-brown hue that gives them their name.

Some 1,700 mounds extend across 20 square miles, rising as high as 400 feet. The land’s limestone base formed from skeletons of sea life. Geologic processes lifted the rock, and water slowly eroded it. Similar processes carve limestone around the world, but the Chocolate Hills' combination of shape and uniformity makes them unique.