Six Flags Over Texas is a 212-acre (86 ha) theme p...

Six Flags Over Texas is a 212-acre (86 ha) theme park located in Arlington, Texas, east of Fort Worth and west of Dallas. It is the first amusement park in the Six Flags chain. The park opened on August 5, 1961, following just a year of construction and an initial investment of US$10 million by real estate developer Angus G. Wynne, Jr.

Firsts and ones of a kind
First Six Flags Theme Park. This is the original Six Flags Theme Park, opened on August 5, 1961
First Pay one Price (POP) admission
First theme park to feature Broadway-style shows (1961)
First Intamin Ride, the Jet Set
First Log Flume El Aserradero (1963)
First Mine Train Roller Coaster The Runaway Mine Train (1966)
First relaunch of the modern-day parachute ride - Texas Chute Out (1976) Removed in 2012.
First Freefall Ride - Texas Cliffhanger (later renamed G-Force and then Wildcatter) (1982). Removed in 2007.
First RMC I-Box hybrid coaster - New Texas Giant (2011)
Records

Tallest Roller Coaster in Texas - Titan (245 ft)
Fastest Roller Coaster in Texas - Titan (85 mph)
Largest Land Based Oil Derrick - Oil Derrick (300 ft)
2nd Tallest Swing Ride in the World - Texas Skyscreamer (400 ft)
Awards
Texas Giant named World's Best Wooden Roller Coaster in 1998 and 1999 by Amusement Today's Golden Ticket Awards.
New Texas Giant named Best New Coaster of 2011 by Amusement Today's Golden Ticket Awards.
Events
Six Flags Over Texas hosts a number of events for different holidays all throughout the operating season that often draws thousands of visitors to the park.

Fright Fest Originally only one night in October called 'Fright Night', Fright Fest is the annual Halloween festival at Six Flags Over Texas. Fright Fest takes place throughout the month of October and features several specialized additions to the park. Haunted houses, decorated pathways, patrolling ghouls and spooky music all contribute to the park's transformation into a giant 'scream' park.
Holiday in the Park A tradition started in 1985, Holiday in the Park is now one of the park's most popular seasonal events as the park's season winds down towards the end of November and throughout December. Hundreds of thousands of Christmas lights are strung around the park buildings and rides. An authentic snow hill is available for visitors to sled down. Festive holiday shows, arts and crafts, and delicious seasonal food also bring the holidays to Six Flags Over Texas.

Excerpt from Wikipedia