[4] Under Perkins' ownership, the park continued to prosper and additional amusements were added, including a 300-foot-diameter pool that became known as Lake Takadip.

Several attempts to reopen the park failed and it remained closed through 1939, although the grounds were occasionally used for company picnics.

The theater and bowling alley were removed in the late 1950s, making Riverside Park a seasonal attraction.

By the 1980s, the park stopped selling individual ride tickets and began charging a "pay one price" admission.

Six years after the opening of Black Widow, the Wildcat was removed and moved to the late Rocky Point Park in Rhode Island.

A majority of the ride was demolished in 1989 to make way for Wild River Falls, a waterslide complex consisting of three sets of slides: Riptide, Blue Lightning and Pipeline.

A popular attraction, Wild River Falls remained in operation until the opening of the Island Kingdom Waterpark in 1997.

[15] The plan died after Agawam voters rejected a non-binding referendum in support of casino gambling in November.

Attractions included the Island Kingdom Waterpark, which featured a children's water play area, various slides and a wave pool.

Main Street U.S.A. was substantially redesigned, and the Southern Center midway was themed to a 1950s city and renamed Rockville.

The park also added The Hellevator, an S&S Worldwide Turbo Drop tower measuring 21 stories tall, which was originally painted red.

Additions included a new slide tower named Shark Attack and a second wave pool called Hurricane Bay.

The main street running through the park was renamed "Carroll Drive" in honor of the family that had owned the place for much of its history.

And the park added a third coaster called flashback which replaced the Black Widow and Rotor in the north end.

However, due to apparent permit issues, the ride was canceled and dismantled, being sent to Six Flags Mexico, which built it in their park.

In 2011, Gotham City Gauntlet: Escape From Arkham Asylum opened up in the DC Superhero Adventure section of the park.

This ride replaced the football field and was placed on the same plot of land that the canceled Dark Knight Coaster was supposed to be built on.

Simultaneously, it was announced that Shipwreck Falls, a water ride located in the North End of the park, would be closing to make way for this attraction.

The 2012 season saw the opening of Goliath in the CrackAxle Canyon section of the park as well as a new restaurant in the same area known as JB's Smokehouse.

At the conclusion of the 2013 season, Taz's DareDevil Dive was closed to make room for New England SkyScreamer, and Twister, an inverting ride located in Rockville, was also removed.

For the 2019 season, Cyborg: Hyper Drive, a spinning flat ride, was installed inside the former Hall of Justice building in DC Superheroes Adventures area of the park.

[27] As a result of the park not opening in the 2020 season due to the COVID-19 pandemic, Supergirl Sky Flyer opened in May 2021 in the newly rethemed DC Universe area of the park, which features newly installed superhero statues and freshly painted buildings.

In July 2021, a tree fell onto Fireball during a thunderstorm, extensively damaging the attraction and leaving it closed for the rest of the season.

The line-up of Looney Tunes characters includes: Bugs Bunny, Daffy Duck, Tweety Bird, Sylvester, Foghorn Leghorn, Porky Pig, Petunia Pig, Pepé Le Pew, Roadrunner, Wile E. Coyote, Marvin the Martian, Taz, Granny, Lola Bunny, Elmer Fudd, Speedy Gonzales, Yosemite Sam and Gossamer.

This addition brought the following characters to the park: Batman, Robin, Aquaman, Wonder Woman, Hawkgirl, Green Lantern, The Flash, The Joker, The Riddler, Sinestro, Cheetah, Lex Luthor and Captain Cold.

The Hall of Justice is located in the building where the Jokers Wild Card flat ride used to be, transforming it into a secret lair.

It was the unique brainchild of world-renowned creative director Gary Goddard and featured five custom-designed floats, 65 performers, and more than 35 support staff members and technicians.

Each float was adorned with vibrant-multicolor lights that illuminate the park and surrounded the streets with custom-composed cirque-inspired music.

The parade featured drummers, puppeteers, singers, dancers, and kinetic stilt walkers to create an unparalleled nighttime spectacular.

This transformation include the addition of Halloween decorations to several of its midway areas (making them Haunt Zones with roaming characters monsters), several shows and five premium haunted attractions: Nightmares, Terror Tales, The Aftermath: Zombies Revenge, Slasher Circus 3D and Midnight Mansion.