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Dungeon Drop closed on October 30, 2005 along with Six Flags AstroWorld. After the park's closure, it was moved to Six Flags St. Louis for the 2006 season. It was going to be named Acrophobia, but the plans were cancelled. Six Flags decided to choose the name Superman: Tower of Power instead. The ride opened on May 19, 2006.
The ride did not appear on the 2021 map.
- "Texas Thrills", The Tyler Courier-Times.
- "Six Flags Saint Louis". Screamscape. Archived from the original on March 26, 2021. https://web.archive.org/web/20210326231919/https://www.screamscape.com/html/six_flags_st__louis.htm. Retrieved March 26, 2021.
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|Former coasters||Batman The Escape • Excalibur • Greezed Lightnin' • Mayan Mindbender • Serial Thriller • Serpent • Swamp Buggy • Texas Cyclone • Texas Tornado • Ultra Twister • Viper • XLR-8|
|Former rides||Bamboo Shoot • Barnstormer • Barrel O'Fun • Diablo Falls • Dungeon Drop • Looping Starship • Swat • Thunder River • Tidal Wave|