Coasterpedia:On this day/04 23

2019	Lav Macerasi, a steel indoor roller coaster manufactured by I.E. Park, opens at Wonderland Eurasia in Ankara, Ankara, Turkey
2017	Boomerang Hyper Coaster, a steel shuttle roller coaster manufactured by Vekoma, closes after 27 years of operation at Knott's Berry Farm in Buena Park, California, USA
2016	Eis Greissler Manufaktur opens in Krumbach, Lower Austria, Austria Cyclone Coaster, a steel roller coaster manufactured by Interpark, opens at Lake City Amusement Park in Guntersville, Alabama, USA
2011	Wooden Warrior, a wooden roller coaster, opens at Quassy Amusement Park in Middlebury, Connecticut, USA
2010	Cyclone, a body water slide manufactured by WhiteWater West, opens at CoCo Key Resort and Water Park in Orlando, Florida, USA Parrot's Perch, a body water slide manufactured by WhiteWater West, opens at CoCo Key Resort and Water Park in Orlando, Florida, USA
2006	Speed Monster, a steel launched roller coaster manufactured by Intamin, opens at TusenFryd in Vinterbro, Oslo, Norway
2005	Wild Train, a steel roller coaster manufactured by Pax Company, opens at Fantasiana in Strasswalchen, Salzburg, Austria Kanonen, a steel launched roller coaster manufactured by Intamin, opens at Liseberg in Gothenburg, Västra Götaland, Sweden
1998	Sega Arena Hamaotsu opens with 2 rides in Hamaotsu, Otsu, Shiga, Japan Blue Fall, a drop tower ride manufactured by Intamin, opens at Sea Paradise in Kanazawa, Yokohama, Kanagawa, Japan
1994	Skycoaster, a Skycoaster ride manufactured by Sky Fun 1 Inc., opens at Kennywood in West Mifflin, Pennsylvania, USA
1983	Thunder River, a River Rapids ride manufactured by Intamin, opens at Six Flags St. Louis in Eureka, Missouri, USA