On this day, 31 years ago, on April 4, 1994 (February 24, 1994, the world's largest wooden frame roller coaster track was completed. On April 4, 1994, the world's largest wooden frame roller coaster ride "White Whirlwind" was completed in the Japanese hot spring resort of Nagano. This roller coaster has a length of 1715 meters and a highest point of 45.5 meters. It shares 4800 cubic meters of pine wood, which is equivalent to the amount of wood needed to build 1000 ordinary Japanese houses.