Before Spaniards arrived in the Philippines, Ivatans built their houses from cogon grass. These homes were small, well-situated, and designed to protect against strong winds. The Spaniards introduced large-scale production of lime to the Ivatan for the construction of their now-famous stone houses. Meter-thick limestone walls, are designed to protect against the harsh Batanes environment, which is known as a terminal passage of typhoons in the Philippines. The basic cogon grass is still preserved as roofs of their houses, thickly constructed to withstand strong winds. These houses are comparable to the white houses in New Zealand, Ireland, and the Scottish Highlands.