Sally Corporation's all-new haunted attraction, House of Nightmares, opened on April 25 at Gröna Lund, Sweden's historic seaside amusement park.

As they enter an old Victorian mansion, visitors are immediately immersed in the story of Dr Morphio, an American scientist who conducts experiments on human subjects.

Specially designed for Gröna Lund, this one-of-a-kind walk through attraction features animatronic characters and props, CGI video effects, live wire illumination, video projection, illusions, ultraviolet illumination, live performers and more.

"After two years of dreaming, planning and building, I'm thrilled to see the House of Nightmares opening," said Peter Osbeck, Ride Manager at Gröna Lund.

"I'm extremely pleased with the horrific end result from the fabulous crew at Sally Corporation. Working with them has been one of the best and most memorable collaborations of my career."