along with Everland and Seoul Land. In 2011, it ranked 11th in the world in number of visitors with 7.58 million visitors. In May 2013, Lotte World Underland, a theme zone with the theme of a goblin village, was opened on the first basement floor, and 4D Shooting Theater, Media Zone, and restaurants were located in Underland as well. In the case of Magic Island, there was a high-altitude series of high-altitude fighter jets, high-altitude parachutes and high-altitude wave rides in the 1990s, but now there are a gyro attractions consisting of Gyro Drop, Gyroswing, and Gyrospin. Lotte World Ice Rink, which measures 36m × 65m on the third basement floor of Adventure, is a skating attraction. On the west side of Adventure was Lotte World Swimming, but it closed in 2008. KidZania, a children's vocational theme park, is also located here. In addition, Lotte World opened the Gimhae Lotte Water Park in Jangyu-dong, Gimhae-si, Gyeongsangnam-do from 2014 to 2015. On October 14, 2014, Lotte World Aquarium was opened within Lotte World Mall in Songpa-gu, Seoul. In 2016, Lotte World Kids Park was opened in Eunpyeong Lotte Mall. In 2021, the Busan Lotte World Magic Forest Theme Park, also known as Osiria Theme Park, will be opened at the Dongbu Mountain Tourist Complex in Gijang-gun, Busan. Attractions The "Adventure" part of the amusement park is divided into four main floors. Adventure 1F: Underland The Adventures of Sinbad A boat ride that allows passengers to travel along with Sinbad through an underground waterway. The Conquistador An Intamin-made Viking ship ride. It swings back and forth, almost reaching the ceiling of Lotte World at its maximum height. The seats at the ends of the ship rise 5 more meters and 24 degrees higher than the seats towards the middle. Must be at least 110 cm to ride. Flume Ride A log ride consisting of a 4-seat long boat that travels through a Jurassic jungle. Former name was "the Marrakesh Express". Must be at least 110 cm to ride. Camelot Carrousel The merry-go-round located near the middle of Lotte World consists of 64 white horses. This is also the merry-go-round featured in South Korean drama series, Stairway to Heaven. Giant Loop A Larson's fireball type ride made only of one big loop. Passengers are constantly taken for 360 degree spins in a 14m-wide circular rail. The vehicle even stops while upside down. It