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Barbados' total land area is 430 km2 (166.0 sq mi), and it has a coastline of 97 km (60 mi) length. Sometimes compared to a pear or leg of mutton for its physical shape. Along the north-south axis Barbados has a maximum length of 34 kilometres (21 mi), and east-west maximum breadth of 23 kilometres (14 mi).
The physical characteristics of Barbados are its lowlands or gently sloping, terraced plains, separated by rolling hills that generally parallel the coasts. Elevations in the interior range from 180 to 240 meters above sea level. Mount Hillaby is the highest point at 340 meters above sea level. Farther south, at Christ Church Ridge, elevations range from sixty to ninety meters. Eighty-five percent of the island's surface consists of coralline limestone twenty-four to thirty meters thick; Scotland District contains outcroppings of oceanic formations at the surface, however. Sugarcane is planted on almost 80 percent of the island's limestone surface. The soils vary in fertility; erosion is a problem, with crop loss resulting from landslides, washouts, and falling rocks. Most of the small streams are in Scotland District. The rest of the island has few surface streams; nevertheless, rainwater saturates the soil to produce underground channels such as the famous Coles Cave.
In 2009 and 2010, members of the upscale real estate industry in Barbados propose the creation of artificial islands to be placed off the west coast. According to Paul Altman of Altman Realty the envisioned plan, would consist of two islands, one measuring 250 acres (1.0 km2) in size, and would house new tourism based developments and upscale boutique shops; while the second island would be 50 acres (200,000 m2) in size, and would serve as an open national park. Both proposed islands would be a short distance from the Deep Water Harbour in Bridgetown.