Back in the mid-1990s, Largo, Maryland's Adventure World (now Six Flags America) was just starting to take stance as a major theme park for the region of Washington D.C., with a small collection of coasters to call its own and several themed areas. And 1997 brought the park one major step closer on the road to becoming a major player in the world of theme parks with the addition of Skull Island, a new section containing one of the first innovative attractions to call the park home: the Typhoon SeaCoaster. Sticking with its name, the SeaCoaster is a hybrid ride mixing a roller coaster thrill or two with a wet 'n' wild flume ride course - the first of a number of rides worldwide to try and do so. But the other real innovation comes with three turntable sections during the layout to rotate boats around, two of those acheiving a complete one-hundred and eighty degrees so that adventure-seekers get to experience the Typhoon SeaCoaster's most unique coaster-like element - the first ever Camelback Hump on a water ride - without knowing what's just ahead. Add that all up with two tunnels, two lift hills, eight curves and one final eighty-foot plunge, and you've got a water rude not to miss for any thrill-seeker, parkgoer, or anyone just looking to escape from the scorching summer heat.In 2007, the park began upgrading the ride, renaming it Skull Mountain.

In 2011 the ride was closed for good to make way for Iron Wolf, Six Flags Great America’s Stand-Up coaster that was being relocated to Six Flags America. Iron Wolf reopened at Six Flags America with the name of Apocalypse, repainted to an orange and gray color scheme, and rethemed to the Skull Island area.

In the loading station of the Skull Mountain, a waiting eight-passenger boat is boarded, safety belts connected as it moves through the station at a snail's pace. At the end of the loading platform, the vehicle dips down and things get moving as the boat enters a first tunnel. The ride encounters a U-turn in darkness and navigates some rapids as it sails past some theming inside of the tunnel, another U-curve in darkness bringing the ride back out into fresh air. Before long, passengers are headed up the first lift hill to the top. Once over the crest, the boat slides onto a platform and is spun around 180 degrees, facing backwards as it begins the first plunge. But this isn't the only surprise in store for Skull Mountaineers... At the bottom of the pull-out, the flume heads right back up again and over the crest of the camel-back hill and plunging down once more with a splash. Riders are taken through the darkness of a second tunnel carved into the terrain of a grassy hill next without knowing exactly what to expect next. After winding around another U-turn, the boat comes to another turntable and is rotated back into the frontwards heading to complete the remainder of the course. With a right-hand bend leading back underneath the first turntable, the flume meanders around and into a turnaround in the opposite direction, which brings riders to the long final climb. The second belt takes the boat up slowly towards the face of an artificial mountain face, finally arriving at a height of eighty feet over the wooden tracks of the Wild One below. Once last turntable is used to spin passengers 135 degrees to arrive in line with the last plunge, and the vehicle is released on its way down the drop through a face of a giant stone skull. Splashing down at the bottom, passengers move forward to encounter one more curve section bringing riders back to the station.