7785 Arkham Asylum is a Batman set released in 2006. It includes seven minifigures and two vehicles. It also includes buildings used for research and experiments, storage, and holding cells, as well as a gate and guard tower for security. Batman appears in his black suit and is also equipped with a jetpack to help him fly.
This is a quote taken from LEGO.com. Do not modify it.
Do you dare enter Arkham Asylum?
Do you dare enter Arkham Asylum? The worst criminals in Gotham City are imprisoned behind the gloomy walls of Arkham Asylum. The Scarecrow, the master of fear; The Riddler, the prince of puzzles; Poison Ivy, beautiful and deadly queen of the plant kingdom -- all have been sent to Arkham by the Batman. Now they threaten to escape, and only the Dark Knight and Nightwing can stop them! Includes a guard tower, asylum van, cells for the criminals, a bed sheet 'rope' for escapes, Nightwing's cycle and much more! Includes Batman, Nightwing, The Riddler, The Scarecrow, Poison Ivy, and two Arkham Asylum guard minifigures.