Harley Quinn Crazy Train

This Zierer Tivoli-model junior coaster opened in 1999 as Blackbeard's Lost Treasure Train, part of a new Looney Tunes Seaport children's area added during Six Flags' late-1990s "war on lines" expansion push. Its unusually long 20-car train — by far the longest in the park — completes a double figure-eight layout in a single cycle, giving it a longer ride time than most junior coasters manage with a single circuit.

The ride operated under its pirate theme for well over a decade before Six Flags rethemed it to Harley Quinn Crazy Train in 2016, timed to coincide with the debut of The Joker free-spin coaster nearby on the Lakefront. Harley Quinn's role as the Joker's accomplice in DC Comics made the pairing a natural fit, and the rebrand marked the park's first ride themed specifically to a female DC villain.

Because it uses a single train with no block safety system needed, the ride's station also functions as its main brake run, an efficient design that has kept operating costs low through more than two decades of continuous service. Family-friendly by design, it remains one of the more accessible coaster credits in the park for younger and first-time riders.