South Korea most of which is not arable. Lowlands, located primarily in the west and southeast, make up only 30% of the total land area. About three thousand islands, mostly small and uninhabited, lie off the western and southern coasts of South Korea. Jeju-do is about off the southern coast of South Korea. It is the country's largest island, with an area of . Jeju is also the site of South Korea's highest point: Hallasan, an extinct volcano, reaches above sea level. The easternmost islands of South Korea include Ulleungdo and Liancourt Rocks (Dokdo/Takeshima), while Marado and Socotra Rock are the southernmost
Volcano: The Blast Coaster flying debris. Volcano: The Blast Coaster once held the record of the highest inversion in the world at . In May 2013, GateKeeper at Cedar Point took the record with an inversion that stands at . Volcano: The Blast Coaster Volcano: The Blast Coaster (often shortened to Volcano) is a launched inverted roller coaster at Kings Dominion in Doswell, Virginia. Designed by Werner Stengel and built by Intamin, Volcano was the world's first inverted roller coaster to feature an linear induction motor (LIM) and is the only one of its kind that completes a full circuit. The roller coaster opened