located_in_the_administrative_territorial_entity viper 
A travelling funfair , often simply called a fair , is a small to medium - sized travelling show primarily composed ___MASK50___ stalls and other amusements . ___MASK51___ ( see pronunciations ) is a state in the Midwestern region ___MASK50___ the United States , achieving statehood in 1821 . With over six million residents , it is the eighteenth most populous state and host to the mean ___MASK6___ ___MASK50___ United States population . The largest urban areas are St . Louis , Kansas City , Springfield , and Columbia . The capitol is in Jefferson City on the ___MASK51___ River . The state is the twenty - first most extensive by area and is geographically diverse . The ___MASK59___ Plains were once covered by glaciers , then tallgrass prairie , and now the deep soils yield great agricultural productivity . In the South are the Ozarks , a forested highland , providing timber , minerals , and recreation . The Mississippi River forms the eastern border ___MASK50___ the state , eventually flowing into the swampy ___MASK51___ Bootheel . St . ___MASK21___ is an independent city and major U . S . port in the State ___MASK50___ Missouri , built along the western bank ___MASK50___ the ___MASK42___ River , on the border with Illinois . The city has an estimated 2015 population ___MASK50___ 315 , 685 , and is the cultural and economic ___MASK6___ ___MASK50___ the Greater St . ___MASK21___ area ( home to 2 , 916 , 447 people ), making it the largest metropolitan area in Missouri and the 19th - largest in the United States . A roller coaster is an amusement ride developed for amusement parks and modern theme parks . LaMarcus Adna ___MASK36___ obtained a patent regarding roller coasters on January 20 , 1885 , which were made out ___MASK50___ wood , but this patent is considerably later than the " Russian mountains " described below . In essence a specialized railroad system , a roller coaster consists ___MASK50___ a track that rises in designed patterns , sometimes with one or more " inversions " ( such as vertical loops ) that briefly turn the rider upside down . The track does not necessarily have to be a complete circuit , as shuttle roller coasters demonstrate . Most roller coasters have multiple cars in which passengers sit and are restrained . Two or more cars hooked together are called a train . Some roller coasters , notably wild mouse roller coasters , run with single cars . Greater St . ___MASK21___ is the metropolitan area that completely surrounds and includes the independent city ___MASK50___ St . ___MASK21___ ( the principal city ). It includes parts ___MASK50___ both the U . S . states ___MASK50___ Missouri and Illinois . The city core in on the border to Illinois and collectively the two regions form the combined metropolitan area . St . ___MASK21___ is the largest metro area in Missouri , and is the second largest in Illinois . St . ___MASK21___ County overlays the city ___MASK50___ St . ___MASK21___ and their two populations are generally tabulated independently ___MASK50___ each other . Engineers design materials , structures , and systems while considering the limitations imposed by practicality , regulation , safety , and cost . The word " engineer (" from the Latin " ingeniator "")" is derived from the Latin words " ingeniare " (" to contrive , devise ") and " ingenium " (" cleverness "). The foundation education ___MASK50___ an engineer is typically a 4 - year bachelor ' s degree or in some countries , a master ' s degree in an engineering discipline plus 4  6 years peer - reviewed professional practice culminating in a project report or thesis . Engineers who seek a professional engineer license in N . America will be required to take further exams in ethics , law and professional practice . " Six flags over ___MASK41___ " is the slogan used to describe the six countries that have had sovereignty over some or all of the current territory of the U . S . state of ___MASK41___ : Spain ( 1519  1685 ; 1690  1821 ), France ( 1685  1690 ), Mexico ( 1821  1836 ), the Republic of ___MASK41___ ( 1836  1845 ), the Confederate States of America ( 1861  1865 ), and the United States of America ( 1845  1861 ; 1865  present ). This slogan has been incorporated into shopping malls , theme parks ( Six Flags ), and other enterprises . The six flags are also shown on the reverse of the Seal of ___MASK41___ . An amusement park ( sometimes referred to as a funfair ) or theme park is a group ___MASK50___ entertainment attractions , rides , and other events in a location for the enjoyment ___MASK50___ large numbers ___MASK50___ people . Amusement parks have a fixed location , as opposed to travelling funfairs and traveling carnivals , and are more elaborate than simple city parks or playgrounds , usually providing attractions meant to cater specifically to certain age groups , as well as some that are aimed towards all ages . Theme parks , a specific type ___MASK50___ amusement park , are usually much more intricately themed to a certain subject or group ___MASK50___ subjects than normal amusement parks . ___MASK83___ is the ___MASK26___ populous city in ___MASK41___ and the fourth - ___MASK26___ populous city in the United States after Chicago , located in Southeast ___MASK41___ near the Gulf of Mexico . With a census - estimated 2014 population of 2 . 239 million within an area of , it also is the largest city in the Southern United States , as well as the seat of Harris County . It is the principal city of ___MASK83___  The Woodlands  Sugar Land , which is the fifth - ___MASK26___ populated metropolitan area in the United States of America . The Viper at Six Flags AstroWorld was an Anton Schwarzkopf designed Looping Star model and had operated at AstroWorld since 1989 . It consisted ___MASK50___ a single loop and was demolished with the closing ___MASK50___ AstroWorld on October 30 , 2005 . It had originally been the Jet Scream at Six Flags St . Louis . Six Flags AstroWorld was a seasonally operated theme park located on approximately ___MASK50___ land ( later expanded to over ) between Kirby Drive and Fannin Avenue , directly south ___MASK50___ Loop 610 in Houston , ___MASK41___ . Opening on June 1 , 1968 , it was originally developed and constructed as part ___MASK50___ the Astrodomain , the brainchild ___MASK50___ local philanthropist and former Houston mayor Judge Roy Hofheinz , who intended it to complement The Astrodome . Six Flags St . ___MASK21___ , originally known as Six Flags Over Mid - America , is a theme park located in Eureka , Missouri , a suburb within southwestern Greater St . ___MASK21___ . The park is located within the far northeastern portion ___MASK50___ the Ozark Plateau , 34 miles southwest ___MASK50___ downtown St . ___MASK21___ , Missouri . The park opened on June 5 , 1971 . It was the third ___MASK50___ only three company start - up parks created by the Six Flags chain . The other two parks built from the ground up were Six Flags over ___MASK41___ and Six Flags over Georgia . Unlike the other two parks , which are currently managed but are no longer owned by Six Flags , Six Flags St . ___MASK21___ is still completely owned and operated by the Six Flags corporation . The park branded itself as ' The Coaster Capital ___MASK50___ Missouri ' in 2013 . Admission to Six Flags St . ___MASK21___ also includes free admission to Hurricane Harbor . Six Flags Entertainment Corporation , or simply Six Flags , is an amusement park corporation based in the United States , with properties in the US , ___MASK80___ , and ___MASK54___ . It is the largest amusement park company based on the number ___MASK50___ properties it owns , and the fifth - most popular in terms ___MASK50___ attendance . The company maintains 18 properties throughout North America consisting ___MASK50___ theme parks , thrill parks , water parks , and family entertainment centers . In 2009 , Six Flags properties hosted 23 . 9 million guests . Six Flags Over ___MASK100___ is a theme park located west ___MASK50___ ___MASK43___ in Cobb County , ___MASK100___ , United States . Featuring characters and themes from a variety ___MASK50___ Warner Bros . properties such as " Looney Tunes " and DC Comics , the park opened to the public in 1967 as the second ___MASK50___ three theme parks built by Six Flags . It features eleven roller coasters , including top - ranked Mind Bender and Goliath that have been recognized annually by " Amusement Today ", and over 30 other rides , shows , and attractions . Hurricane Harbor , a water park included in the price ___MASK50___ admission to the amusement park , was added in 2014 . Anton Schwarzkopf ( 8 July 1924  30 July 2001 ) was a German engineer ___MASK50___ amusement rides , and founder ___MASK50___ the Schwarzkopf Industries Company , which built numerous amusement rides and large roller coasters for both amusement parks and travelling funfairs . ___MASK78___ is a city located in St . ___MASK21___ County , Missouri , United States between the cities ___MASK50___ St . ___MASK21___ and Pacific along Interstate 44 . It is a portion ___MASK50___ the Greater St . ___MASK21___ metro area . As ___MASK50___ the 2010 census , the city had a population ___MASK50___ 10 , 189 . Since 1971 , ___MASK78___ has been known as the home ___MASK50___ the amusement park Six Flags St . ___MASK21___ ( formerly Six Flags Over Mid - America ).